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How to do the third question in the second volume of Xiao Ai's second grade mathematical composition?
Mainly based on the mixed operation of multiplication and division and addition and subtraction or addition and subtraction, multiplication and division.

For example, what did you buy with your father in the supermarket today? What is the unit price and quantity? Dad bought 3 kilograms of meat, 2/kloc-0 yuan per kilogram, 5 kilograms of fish, 6 kilograms of apples, and 5 kilograms of 9 yuan. How much does dad have to pay? After shopping, I was hungry, and my father took me.

Just write it like this, and it's OK.