1. Original price 2. 50% off and 30% off. Let the original price be 95% x = 61.75x = 61.75 ÷ 0.95x = 6565-61.75 = 3.25 Yuan 4. Wrong, because the coupon was sent.
5. slightly 6. What do you mean? No problem. . . Step 7 omit
8.1980× (1+20%) = 2376 yuan 9. 15 ÷ 2 = 7.5. Everything from 7.5 to 15 is correct, except 7.5 and 15.