MA[The Budgetary Process]

Hello Sir,

I have some confusion about the budgetary process.

The following details have been extracted from the receivables records of X:
Invoices paid in the month after sale 60%
Invoices paid in the second month after sale 25%
Invoices paid in the third month after sale 12%
Bad debts 3%
Credit sales for June to September are budgeted as follows:
June $35,000
July $40,000
August $60,000
September $45,000
Customers paying in the month after sale are entitled to deduct a 2% settlement discount.
Invoices are issued on the last day of the month.
The amount budgeted to be received in September from credit sales is:
A. $46,260
B. $49,480
C. $50,200
D. $50,530

I don’t understand why in the solution they are assigning Invoice paid in the month after sale 60% to August. I thought that the correct way would be giving 12% for the August sales because June July August is the third month.

Solution:

August Sales 60000*60%*0.98=35280
July sales 40000*25%=10 000
June sales 35000*12=4200

Answer 49480

Thank you in advance!