here is a forecast of sales by national bromide for the first 4 months of 2017 (figures are in thousands)

Month 1 2 3 4

cash sales 29 38 32 28

credit sales 170 190 160 140

On average, 50% of credit sales are paid for in the current month, 30% in the next month, and the remainder in the month after that. What are the expected cash collections in months 3 and 4?