1: plastic film is about 2 10 yuan.

2. Potatoes are planted in 800 yuan.

3. Fertilizer around 800 yuan.

4:: Pesticide probably 120 yuan.

If three sheds of potatoes are planted, the investment is as follows:

1: plastic film is about 2 10 yuan.

2. Potatoes are planted in 800 yuan.

3. Fertilizer around 800 yuan.

4:: Pesticide probably 120 yuan.

5:: Steel pipe is about 15000 yuan, and bamboo is cheaper.

6. Film: 900 yuan.