Information on Guadalupe Ltd$.\text{'}$s three products follows:

A$,$ B$,$ & C

Unit sales per month. $....1,5001,2002,000$

Selling price per unit. $$20\mathrm{.}00$ $$14\mathrm{.}00$ $$30\mathrm{.}00$

Variable costs per unit. $(22\mathrm{.}00)(10\mathrm{.}00)(18\mathrm{.}00)$

Unit contribution margin. $ $(2\mathrm{.}00)$ $$4\mathrm{.}00$ $$12\mathrm{.}00$

Determine the effect each of the following situations would have on monthly profits. Each situation below should be evaluated independently of all others.

a$.$ Product A is discontinued.

b$.$ Product A is discontinued, and the subsequent loss of customers causes sales of Product B to decline by $150$ units. Hint: The answer is an increase in monthly profits by $$2,400.$ Please show how this answer is calculated.

c$.$ The selling price of A is increased to $$25$ with a sales decrease of $250$ units.

d$.$ The price of Product B is increased to $$20$ with a resulting sales decrease of $300$ units. However, some of these customers shift to Product A; sales of Product A increased by $200$ units. Hint: The answer is an increase in monthly profits of $$3,800.$ Please show how this answer is calculated.

e$.$ Product A is discontinued, and the plant in which A was produced is used to produce D$,$ a new prod$-$ uct. Product D has a unit contribution margin of $$2.$ Monthly sales of Product D are predicted to be $1,500$ units.

f$.$ The selling price of Product C is increased to $$35,$ and the selling price of Product B is decreased to $$10.$ Sales of C decline by $350$ units, while sales of B increase by $400$ units. Hint: The answer is a decrease in monthly profits of $$750.$ Please show how this answer is calculated.