What is the cost of the bookcase with four layers of angle steel on the side of length 1 m, width 0.3 m and height 1.2 m? Please estimate according to the price in Changchun.

First, calculate the length of angle steel to be used.

The perimeter of each floor is (1+0.3) x 2 = 2.6m..

Angle steel 2.6x4 = 10.4m is required for the 4th floor.

Four feet1.2x4 = 4.8m.

Angle steel 10.4+4.8 = 15.2m (excluding loss) is needed in total.

The length of an angle steel is 6 meters, and the number of angles to be purchased is: 15.2 divided by 6, rounded to the nearest =3 angles.

First, the material cost:

Standard 30x30x3 angle steel 28 yuan/root Total material cost: 84 yuan

If you buy 40x40x4 angle steel 36 yuan/root, the total material cost is 108 yuan.

B, processing fee: I don't know the labor price of your local welder, and the estimated labor cost is 100 yuan.

C. freight: excluding.

Therefore, the total cost excluding freight (A+B+C):30 x30x 3 angle steel 184 yuan; Using 40x40x4 angle steel is 208 yuan.