Fill in the missing amounts in each of the eight case situations below. Each case is independent of the others Required: a. Assume that only one product is being sold in each of the four following case situations:(input all amounts as positive values except losses which should be indicated by a minus sign.) b. Assume that more than one product is being sold in each of the four following case situations: (Input all amounts as positive values except losses which should be indicated by a minus sign.)