You sent out a test mailing which generates 10,000 orders. The promotion cost is $55,000. The selling price of the Whatchamacallit was $50 with a variable cost of $22.50, thus giving a contribution or unit margin of $27.50. You were given an advertising allowable of $6 per order. Calculate the following:

What is the Return on Investment for Advertising (ROAI) for the Whatchamacallit (as a percent)? [Do not include $ or % signs in the answer]