Answer:
$2793
Given that Jon made 28 stacks of long-sleeved t-shirts with 25 shirts in each stack, we can find the total number of shirts by multiplying the number of stacks by the number of shirts in each stack: 28 stacks * 25 shirts = 700 shirts Next, we multiply the total number of shirts by the cost per shirt, which is $3.99: 700 shirts * $3.99/shirt = $2793 Therefore, the store had to pay $2793 for all the shirts Jon stacked.