There are 50 students in a class, and each student's family uses salad oil 1 barrel, drinks 10 cans and mineral water 10 bottles on average every month. So, how much money can you save by recycling these wastes a year?

The following is the price list of recycled items counted by students in a school:

Name of the recycled item

success

minute

Quality/100 piece

unit price

total

5 liters of salad oil

plastic

10 kg

10 yuan/kg

100 yuan

250 ml beverage can

aluminium (Al)

1 kg

20 yuan/kg

20 yuan

500 ml mineral water bottle

plastic

1 kg

10 yuan/kg

10 yuan

Answer:12× 50× (100 ÷100+20 ÷100×/0 ÷100× 65433).

It can save 2400 yuan.