Teacher, do me a favor. Can you help me? It is urgent. Enterprise A intends to purchase the right to use the famous clothing trademark of enterprise B for a period of 8 years.

1After the price increase in 0 yuan, the net profit was 10 * (1-25%) = 5.625, so the net profit per unit commodity increased by 5.625 yuan.

v=50*5.625/ 1. 1+55*5.625/ 1. 1^2+54*5.625/ 1. 1^3+52*5.625/ 1. 1^4+5 1*5.625/ 1 . 1^5+50*5.625/ 0. 1/ 1. 1^5=5.625(50/ 1. 1+55/ 1.2 1+54/ 1.33 1+52/ 1 .464+5 1/ 1.6 1 1+500/ 1.6 1 1)

=5.625*509=2863

You don't help me calculate either, lazy!