Pls help explain thank you

Question 1 0/1 pts ABC makes all sales on account, subject to the following collection pattern: 30% are collected in the month of sale; 60% are collected in the first month after sale; and 10% are collected in the second month after sale. If sales for June, July, and August were $123,261,$163,450, and $220,722, respectively, what were the firm's budgeted collections for August? Enter your response without a \$ sign or comma. Round to the nearest whole number. 176,613