Answer: 
$16,550 
Explanation: 
The computation of total cash collections in the month of June is shown below:- 
Total cash collections in the month of June = (June sales × Percentage of collection) + (May sales × Percentage) + (April × Percentage) 
= ($25,000 × 20%) + ($15,000 × 65%) + ($12,000 × 15%) 
= $5,000 + $9,750 + $1,800
= $16,550
So, for computing the total cash collections in the month of June we simply applied the above formula.