diff --git a/supportedBackends/google/pipelines/common/src/main/scala/cromwell/backend/google/pipelines/common/PredefinedMachineType.scala b/supportedBackends/google/pipelines/common/src/main/scala/cromwell/backend/google/pipelines/common/PredefinedMachineType.scala
index a0544b9b253..6716a3561f5 100644
--- a/supportedBackends/google/pipelines/common/src/main/scala/cromwell/backend/google/pipelines/common/PredefinedMachineType.scala
+++ b/supportedBackends/google/pipelines/common/src/main/scala/cromwell/backend/google/pipelines/common/PredefinedMachineType.scala
@@ -1,17 +1,14 @@
 package cromwell.backend.google.pipelines.common
 
-import cromwell.backend.google.pipelines.common.CustomMachineType._
 import eu.timepit.refined.api.Refined
 import eu.timepit.refined.numeric.Positive
-import eu.timepit.refined.refineV
-import mouse.all._
 import org.slf4j.Logger
 import wdl4s.parser.MemoryUnit
 import wom.format.MemorySize
-import math.{log, pow}
 
 case class PredefinedMachineType(cpuCount: Int, gcpString: String)
 object PredefinedMachineType {
+  // hardcoded values from: https://cloud.google.com/compute/docs/general-purpose-machines#c3-standard
   val c3Standard_4 = PredefinedMachineType(4, "c3-standard-4")
   val c3Standard_8 = PredefinedMachineType(8, "c3-standard-8")
   val c3Standard_22 = PredefinedMachineType(22, "c3-standard-22")
@@ -22,7 +19,7 @@ object PredefinedMachineType {
   def getClosestC3Machine(requestedMemory: MemorySize, requestedCpu: Refined[Int, Positive],  jobLogger: Logger): String = {
     val adjustedMemory: MemorySize = MemorySize(requestedCpu.value * 4.0, MemoryUnit.GB)
     if (adjustedMemory != requestedMemory) {
-      jobLogger.info(s"Adjusting memory from ${requestedMemory.amount} to ${adjustedMemory.amount} in order to match GCP requirements for the requested CPU.")
+      jobLogger.info(s"Adjusting memory from ${requestedMemory.toString} to ${adjustedMemory.toString} in order to match GCP requirements for the requested CPU.")
     }
     val machine = requestedCpu.value match {
       case cpu if cpu <= 4 => c3Standard_4