Am I entering appeal expenses and costs correctly?

Hi everyone. 

We just started tracking costs on mailed appeals.

For our annual report, I used a per-piece delivery cost under Sources. Then, on the Appeal Expenses tab I entered the total printing cost. I see that reports generates the total expense, however I am wondering if there is a per piece calculation and average donation calculation? Perhaps folks use analytics for this?

Any advice is appreciated to better review the appeal's ROI...

JM Huck
coordinator, The Neon Museum