Hello landlord A: 50/(10+1) = 4 ... 6 (piece) (4* 10+6)*50=2300 (yuan).

B: (50-5)*50=2250 yuan.

C: 50 * 50/(200+20) =1... 80 (yuan) 1 1*200+80=2280 (yuan)

2250 yuan

A: Shop B offers the best discount.

Hope to adopt thank you!