(1)求A、B两种文具各购进多少套?
(2)A种文具每套进价30元,该文具商店在A种文具进价的基础上提高20%出售,B种文具的进价比售价少,两种文具全部售出后共获利420元。求B种文具每套的进价为多少元?
(3)在(2)的条件下,文具商店再次从文具厂购进A、B两种文具共200套,文具厂把A、B两种文具都打八折出售给文具商店,文具商店将A种文具在原售价降低后出售,文具商店将B种文具在原售价七折后出售。该文具商店将此次购进的200套文具全部售出。此次销售共获利多少元?
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2