Traditional Culture Encyclopedia - Traditional customs - This store wholesales 280 footballs from the factory, each 30 yuan. (1) How much does the store have to pay the manufacturer? (2) After the store sold 220 units at the price of 38 yuan,

This store wholesales 280 footballs from the factory, each 30 yuan. (1) How much does the store have to pay the manufacturer? (2) After the store sold 220 units at the price of 38 yuan,

(1)30×280=8400 yuan.

A: The store has to pay the manufacturer 8400 yuan.

(2)38×220+20×(280-220),

=8360+20×60,

=8360+ 1200,

=9560 (yuan),

9560 > 8400, so the store is profitable.

9560-8400= 1 160 (yuan).

Answer: The store earned 1 160 yuan.