Fresplanade Co

Fresplanade Co.had the following historical pattern for its credit sales:
75% collected in the month of sale
12% collected in the first month after sale
8% collected in the second month after sale
3% collected in the third month after sale
2% uncollectible
The sales on open account (credit sales) have been budgeted for the last six months of the year as shown below:
July $72,000
August $84,000
September $96,000
October $108,000
November $120,000
December $102,000
The estimated cash collection during September from July,August,and September accounts receivable is:

A) $83,160.
B) $79,380.
C) $87,840.
D) $54,000.
E) $71,640.