Expanded Heading using a Matrix

I have a very basic matrix report that I want to create to display inventory usage by month.

I would like the report to show some basic inventory product information and then the monthly usage beneath.

Part Number: 25002560      Description: 2 x 4 x 8 Spruce Lumber         U/M: Each                Avg Cost:  $5.68

Jan          Feb       Mar          Apr             May           June          July      Aug       Sep         Oct     Nov     Dec

101          256       89          158             698          548           469      378       229          113     156     219

Part Number: 25002568      Description: 2 x 6 x 8 Spruce Lumber         U/M: Each                Avg Cost:  $7.68

Jan          Feb       Mar          Apr             May           June          July      Aug       Sep         Oct     Nov     Dec

247          153       159        248             138          213           336      278       142          186     209     241

The only way I have been able to accomplish this is to place a table on the report with a Dataset that points to the inventory information  and then place a subreport in the detail section that uses a matrix to display the usage information. This works, but the overhead is horrendous. A report with 25 SKUs takes almost 2 minutes to generate when subreports are used.

Any suggestions as to how could accomplish my desired result without having to use a subreport.

Leonard