Answer:
$103.71
Explanation:
Take the amount of the dog food cans and multiply it by 7:
7×$1.29=$9.03
Take the new number and multiply it by 4, since we need to figure out how much he spends in 4 weeks:
$9.03×4=$36.12
Now add the cost of the bagged dog food to the cost of the 7 cans throughout the 4 weeks:
$36.12+$67.59=$103.71