A company calculates customer lifetime value $($CLV$)$ using a margin multiple $($m$)$ of $2\mathrm{.}5,$ corresponding to $80\%$ retention rate $($r$).$ The discount rate $($i$)$ of the firm is $12\%.$ Assume the estimated average monthly revenue of a customer is $$125,$ and the estimated average monthly cost of a customer is $$40.$ Using the simplified CLV equation, what is the CLV of the average customer of this firm?

A$.$

$$1,020$

B$.$

$$3,000$

C$.$

$$3,750$

D$.$

$$2,550$

E$.$

$$1,125$