Material Resource Aggregation

On previous projects the client wanted to calculate EV & % Complete based on installed quantities of differing material resources with differing UOM.  To accomplish this I set the cost for each to 1.0 and ran resource assignment reports grouping on the resource name and aggregating the actual/early/late cost to produce S curves and used the totals to calculate productivity rates and EV.  I now have a client that wants to do the same thing but also wants to utilize the Price/Unit function as designed to calculate various cash flows for various material installations as well as a material cash