diff --git a/slurm-eff-tool.py b/slurm-eff-tool.py
index fadaba5..3953dca 100755
--- a/slurm-eff-tool.py
+++ b/slurm-eff-tool.py
@@ -751,7 +751,7 @@ def make_single_row(rec: JobRecord, dflt_mpcpu: float) -> OutputRow:
         waste_mem = max(0,walltime * (100-rec.mem_eff)/100 \
             * (rec.reqmem_gb - rec.cpus * dflt_mpcpu))
 
-    waste_cpu=None
+    waste_cpu = None
     if rec.cpu_eff is not None:
         waste_cpu = walltime * (100-rec.cpu_eff) * rec.cpus
 
@@ -814,7 +814,7 @@ def make_aggregate_row(records: list[JobRecord], username: str,
 
     waste_cpu=None
     if cpu_efficiency is not None and walltime is not None:
-        waste_cpu = walltime * (100-cpu_efficiency) * first.cpus
+        waste_cpu = count * walltime * (100-cpu_efficiency) * first.cpus
 
     return OutputRow(
         username=username,