返回列表 回復 發帖
total cost = 8 + 10
; {. W) J# Q- m: O9 @+ Z+ `total sales = 9 + 115.39.217.77$ g5 g* z. m* c

9 Q% m* x' g3 c- G$ M5.39.217.77total profit = 20 - 18 = 2
返回列表