A merchant had rs 78,592 with her. She placed an order for purchasing 40 radio sets at rs1200 each. How much money will remain with her after the purchase?

Total money merchant has = rs 78,592 

She placed an order to purchase 40 radio sets at rs 1200 each.

Total money spent on radio set =   $40\times 1200$= 48000

Remaining amount after purchase = Total amount - Amount spent

Remaining amount after purchase= 78592- 48000= 30,592

Therefore,

30,592 amount will remain with the merchant after the purchase.