So, because there are 3 pounds of apples, you multiply the unit cost of each pound, $2.12, by 3. If you add that answer to the $1.96 for the muffin, you should get a total of $8.31. So, Mrs. Katz spent $8.31.
If apples cost 2.12$ per pound, then 3 pounds of 2.12$ apples costs 6.36$! Plus the muffin, which costs 1.95$, the grand total is 8.31$! (6.36+2.12=8.31)
