Answer:
$38,400
Step-by-step explanation:
1. Cash Purchases: 
The total purchases in the month of March is of $35,000. 
It is given that 70% of Purchases are for cash. 
Hence, 70% of $35,000 would be; 
$39,000 x 0.70 
$27,300 
 
2. Credit Purchases: 
Remaining Balance of Purchases from the month of February: 
For the month of February Cash Purchases can be calculated as follows; 
$37,000 x 0.70 
$25,900 
Remaining Balance to be paid in March for the month of February can be calculated as follows; 
$37,000 - $25,900 
$11,100 
 
3. CASH PAYMENT for PURCHASES in MARCH: 
Cash Purchases = $27,300 
Credit Purchases = $11,100 
Hence; 
Cash Payment for purchases in March = Cash Purchases + Credit Purchases 
Cash Payment for purchases in March = $27,300 + $11,100 
Cash Payment for purchases in March = $38,400