If is 25% of , what is the closest integer to the value of ___?

45.728 x 3.2 = ?

You bought a dozen eggs marked at and received change from . What is the percent of sales tax?

At the farmer's market, oranges are $0.30 each, apples are $0.25 each, bananas are $0.40 each, and tomatoes are $0.60 each. If Scott buys 3 oranges, 7 apples, 4 bananas, and 8 tomatoes, how much does he spend?