1, the price of 5 cm color steel plate is between 45 yuan and 75 yuan, and the price of 7.5 cm color steel plate is between 55 yuan and 90 yuan, with different prices.

2.5 cm color steel is between 0.3 mm and 0.8 mm, and 7.5 cm color steel is between 0.5 mm and 1.0 mm, which is different.