Why is the InventoryLab profit calcualtor giving me different results than AZInsight?

Why is the InventoryLab profit calcualtor giving me different results than AZInsight?

InventoryLab does not utilize the Amazon Revenue Calculator when calculating the ROI and profit margin. Instead estimates the fees. AZInsight accurately calculates and returns all fees directly from Amazon.

When looking at InventoryLab, consider the following:

  1. Are there any custom costs that you have in AZInsight not being accounted for on Inventory Lab? Click here to see where the custom costs are set.
  2. Are storage fees included in AZInsight that are not showing on InventoryLab? Learn here where to find this
  3. Is your ROI calculation including amazon fees as InventoryLab does? Learn here how to set your ROI calculations

Case in point, in the example below, InventoryLab returns a different referral fee and fulfillment fee on the same ASIN as the official Amazon Revenue Calculator does.