Acme Inc. manufactures and sells widgets. Acme Inc. sells widgets for $$15$ each. Acme Inc. uses $3$ gizmos for each widget. Gizmos cost $$2$ each. In December, Acme sold $300$ widgets. Acme also pays rent of $$500$ per month.

please show work.

A$.)$ What is Acme Inc.$\text{'}$s contribution margin per unit?

B$.)$ What is Acme Inc.$\text{'}$s contirbution margin ratio?

C$.)$ Assuming the about information is all revenue and expenses for scme, what is December's net income?

D$.)$ Determine the fixed cost give the following information:

Lowest level of activity$-200$ units at a total cost of $$600$

Highest level of activity$-800$ units at a total cost of $$1,800$

Fixed cost $=$