So our goal is to find the total amount it would be to send 1 small package and 5 large packages. Since we only need to send one small package we don't have to multiply 2.90 by anything. We already have one number.
2.90
Now we need to multiply 4.20 by 5 since we want to send 5 large packages.
4.20 x 5 = 21
Now we need to add 2.90 to 21 to see how much the total cost for shipping would be.
21 + 2.90 = 23.9
The total cost for shipping these packages