Fill in the missing amounts in each of the eight case situations below. Each case is independent of the others. (hint: one way to find the missing amounts would be to prepare a contribution format income statement for each case, enter the known data, and then compute the missing items. ) required: a. Assume that only one product is being sold in each of the four following case situations: b. Assume that more than one product is being sold in each of the four following case situations:.