ACME Inc,Bills Its Clients on the First of the Month

ACME Inc.,bills its clients on the first of the month.For example,any sale made in the month of July is billed August 1 and is due September 1.Clients traditionally pay as follows: 70% by the end of the first month August) ,20% by the end of the second month (September) ,9% by the end of the third month (October) ,and 1% default on their bills.What is the dollar value of January billings collected in April? $$\begin{array} { | l | l | l | l | l | l | } \hline & { \text { First-Quarter Actual Sales } } & && { \text { Second-Quarter Anticipated Sales } } \\\hline \text { January } & \text { February } & \text { March } & \text { April } & \text { May } & \text { June } \\\hline \$ 88,000 & \$ 74,000 & \$ 96,000 & \$ 99,000 & \$ 82,000 & \$ 63,000 \\\hline\end{array}$$

A) $7,040
B) $7,920
C) $3,920
D) $0.00