COST price of the item SOLD at 31% gain = 18602 × 100/(100 + 31) = RS. 14200The cost price of the item sold at 29% loss = 18602 × 100/(100 – 29) = Rs. 26200⇒ The total cost price of both the items = 14200 + 26200 = Rs. 40400The total selling price of both the items = 18602 + 18602 = Rs. 37204Loss = Total cost price – Total selling price⇒ 40400 – 37204⇒ Rs. 3196∴ Loss percent = (3196/40400) × 100 = 7.91%