Posted by susan on .
jack brought 3 items that cost 25 dollars each, and five items that cost 40 dollars each. what was the total cost, including 5% sales tax?

prealgebra 
Ms. Sue,
3 * 25 = ?
5 * 40 = ?
Add those products.
Then multiply the sum by 1.05 to find the total cost.
I'll be glad to check your answer.