Final answer:
The cost of a single shirt is given as $30 ($28 for the shirt and $2 for supplies). The total cost for 4 shirts at $30 each is $120. However, since the total expense given is $144, this suggests that there may be a miscalculation or additional expenses not accounted for.
Step-by-step explanation:
The question involves determining the cost of a single T-shirt when the total expense for multiple shirts is known.
Let's calculate the cost of a single shirt using the information provided. Each shirt costs $28 plus $2 for supplies, which makes the cost of one shirt $30. For 4 shirts, the total cost given is $144. Now, we need to determine if the cost per shirt is indeed $30 based on this total expense.
To verify, we use the equation:
- Cost per shirt × Number of shirts = Total expense
- $30 × 4 = $120
So, the total expense for 4 shirts at $30 each would be $120. However, the total expense given is $144 which suggests that the cost per shirt might be higher or there might be an additional expense not accounted for.
Therefore, if the calculation does not match the total given, there seems to be a miscalculation or assumption in the information provided, as the numbers provided ($28 + $2 supplies cost x 4) do not add up to the total expense of $144.