TB MC Qu. 02-88 Gambino Corporation is.. Gambino Corporation is a wholesaler that sells a single product. Management has provided the following cost dat levels of monthly sales volume Sales volume (units) Cost of sales Selling and administrtive costs 7,300 8,300 $ 553,340629140 $431,500 443,600 The best estimate of the total monthly fixed cost is: O $984,840 $1,072,740 o $1,028,790 O $343170 oer