Assume that the profit generated by a product is given by Upper P (x )equals 3 StartRoot x EndRoot comma where x is the number of units sold. If the profit keeps changing at a rate of $ 1 comma 000 per%E2%80%8B month, then how fast are the sales changing when the number of units sold is 500%E2%80%8B? %E2%80%8B(Round to the nearest dollar per%E2%80%8B month.)