Answer:
Thus, the cash profit made by the shopkeeper is $2.75 
Explanation:
(V) Calculate the cash profit made by the shopkeeper 
By formula Profit = cost price - selling price 
Since , bought a radio from a wholesaler for $25, he paid tax of 15% , sold a radio for $31.50. 
So, Tax = 25/100 = 0.25 x 15 = $3.75 
 Total $25 + 3.75 = $28.75 
Profit = $31.50 - $28.75 = $2.75 
Thus, the cash profit made by the shopkeeper is $2.75