diff --git a/omics/cli/run_analyzer/batch.py b/omics/cli/run_analyzer/batch.py
index b8a43af..818e1c9 100644
--- a/omics/cli/run_analyzer/batch.py
+++ b/omics/cli/run_analyzer/batch.py
@@ -11,8 +11,8 @@
     "meanRunningSeconds",
     "maximumRunningSeconds",
     "stdDevRunningSeconds",
-    "maximumCpuUtilization",
-    "maximumMemoryUtilization",
+    "maximumCpuUtilizationRatio",
+    "maximumMemoryUtilizationRatio",
     "maximumGpusReserved",
     "recommendedCpus",
     "recommendedMemoryGiB",
@@ -47,14 +47,16 @@ def aggregate_and_print(resources_list, pricing, engine, headroom=0.0, out=sys.s
         _aggregate_resources(resources, name, out)
 
 
-def _aggregate_resources(resources, name, out):
+def _aggregate_resources(resources, name, engine, out):
     """Aggregate resources with the same name"""
-    filtered = [r for r in resources if utils.task_base_name(r["name"]) == name]
+    filtered = [r for r in resources if utils.task_base_name(r["name"], engine) == name]
     if filtered:
         res = filtered[0]
         for k in hdrs:
-            if k in ["type", "name"]:
+            if k == "type":
                 continue
+            elif k == "name":
+                res[k] = name
             elif k == "count":
                 res[k] = _do_aggregation(filtered, k, "count")
             elif k.startswith("mean"):
@@ -68,16 +70,16 @@ def _aggregate_resources(resources, name, out):
                 rk = k.replace("maximum", "")[0].lower() + k.replace("maximum", "")[1:]
                 res[k] = _do_aggregation(filtered, rk, "maximum")
             elif k in ["recommendedCpus", "recommendedMemoryGiB"]:
-                _do_aggregation(resources, k, "maximum")
+                res[k] = _do_aggregation(filtered, k, "maximum")
             elif k in ["recommendOmicsInstanceType"]:
-                _do_aggregation(resources, "omicsInstanceTypeMinimum", "maximum")
+               res[k] = _do_aggregation(filtered, "omicsInstanceTypeMinimum", "maximum")
             else:
                 raise ValueError(f"Unhandled aggregation for key: {k}")
 
-        print(",".join([str(res.get(h, "")) for h in hdrs]), file=out)
+    print(",".join([str(res.get(h, "")) for h in hdrs]), file=out)
 
 
-def _do_aggregation(resources, resource_key, operation):
+def _do_aggregation(resources: list, resource_key: str, operation: str):
     if operation == "count":
         return len(resources)
     elif operation == "sum":
@@ -85,7 +87,9 @@ def _do_aggregation(resources, resource_key, operation):
     elif operation == "maximum":
         if resource_key == "omicsInstanceTypeMinimum":
             # special case for instance types
-            return max(resources, key=lambda x: utils.omics_instance_weight(x[resource_key]))
+            instances=[]
+            for r in resources: instances.append(r[resource_key])
+            return max(instances, key=lambda x: utils.omics_instance_weight(x))
         return max([r[resource_key] for r in resources])
     elif operation == "mean":
         return round(statistics.mean([r[resource_key] for r in resources]), 2)
diff --git a/omics/cli/run_analyzer/utils.py b/omics/cli/run_analyzer/utils.py
index 6c0c5e2..12ea260 100644
--- a/omics/cli/run_analyzer/utils.py
+++ b/omics/cli/run_analyzer/utils.py
@@ -36,7 +36,7 @@ def task_base_name(name: str, engine: str) -> str:
 
 
 _sizes = {
-    "": 2,
+    "large": 2,
     "xlarge": 4,
     "2xlarge": 8,
     "4xlarge": 16,
@@ -50,12 +50,10 @@ def task_base_name(name: str, engine: str) -> str:
 
 def omics_instance_weight(instance: str) -> int:
     """Compute a numeric weight for an instance to be used in sorting or finding a max or min"""
-    print(instance)
     # remove the "omics." from the string
     instance = instance.replace("omics.", "")
     # split the instance into family and size
     parts = instance.split(".")
-    print(parts)
     fam = parts[0]
     size = parts[1]
 
diff --git a/tests/cli/run_analyzer/unit/test_batch.py b/tests/cli/run_analyzer/unit/test_batch.py
new file mode 100644
index 0000000..cbbc34d
--- /dev/null
+++ b/tests/cli/run_analyzer/unit/test_batch.py
@@ -0,0 +1,44 @@
+import io
+import unittest
+
+import omics.cli.run_analyzer.batch as batch
+
+class TestRunAnalyzerBatch(unittest.TestCase):
+    def test_do_aggregation(self):
+        resources = [{'key': 2}, {'key': 1}, {'key': 4}]
+        result = batch._do_aggregation(resources, 'key', "count")
+        self.assertEqual(result, 3)
+        result = batch._do_aggregation(resources, 'key', "sum")
+        self.assertEqual(result, 7)
+        result = batch._do_aggregation(resources, 'key', "maximum")
+        self.assertEqual(result, 4)
+        result = batch._do_aggregation(resources, 'key', "mean")
+        self.assertEqual(result, 2.33)
+        result = batch._do_aggregation(resources, 'key', 'stdDev')
+        self.assertEqual(result, 1.53)
+        
+    def test_do_aggregation_with_bad_operation(self):
+        resources = [{'key': 2}, {'key': 1}, {'key': 4}]
+        self.assertRaises(ValueError, batch._do_aggregation, resources, 'key', "bad_operation")
+    
+    def test_aggregate_resources(self):
+        resources=[
+            {   
+                'type': 'run', 'runningSeconds': 10.0, 'cpuUtilizationRatio': 1.0, 'memoryUtilizationRatio': 1.0,
+                 'gpusReserved': 0, 'recommendedCpus': 4, 'recommendedMemoryGiB': 8, 
+                 'omicsInstanceTypeMinimum': 'omics.c.large', 'estimatedUSD':1.00,
+                 'name': 'foo-01-000'
+            },
+            {
+                'type': 'run', 'runningSeconds': 20.0, 'cpuUtilizationRatio': 1.0, 'memoryUtilizationRatio': 1.0,
+                'gpusReserved': 0, 'recommendedCpus': 4, 'recommendedMemoryGiB': 8,
+                'omicsInstanceTypeMinimum': 'omics.c.large', 'estimatedUSD':1.00,
+                'name': 'foo-02-000'
+            }
+        ]
+        with io.StringIO() as result:
+            batch._aggregate_resources(resources=resources, name='foo', engine='WDL', out=result)
+            self.assertEqual(result.getvalue(), 'run,foo,2,15.0,20.0,7.07,1.0,1.0,0,4,8,omics.c.large,1.0,1.0\n')
+
+
+