Kendall had $12 ($5 + $7) after doing her chores and receiving money from her parents. Cambrie had $12 ($7 + $5) after doing her chores and receiving payment.
This is an example of the distributive property of addition, which means that when you add two numbers and then multiply the sum by a third number, you get the same result if you multiply each addend by the third number and then add the products together.