I'd like ot understand how to do the following, I keep getting 25,800

Jelson Company expects the following total sales: Month Sales March $30,000 April $20000 Ma? $30000 June $250000 The company expects 60% of its sales to be credit sales and 40% for cash. Credit sales are collected as follows: 30% in the month of sale, 70% in the month following the sale. The budgeted accounts receivable balance on May 31 is: 0 $20,400. 0 $12,600. 0 $12,240. 0 $21,000