Stan bought several clothing items at macys. He bought a jacket for $30.00, a hat for $10.00, and two shirts for $5.00 each. He had a coupon that took 30% off the total bill. He paid with a $50.00 bill and received three of the same types of bills in change. What were those bills ?

30 + 10 + 10 = 50

50 * 0.7 = 35

50 - 35 = ?

To find the bills Stan received as change, we need to calculate the total cost of his purchases, taking into account the discount, and then determine the bills that make up the change.

First, let's calculate the total cost before the discount:
Jacket: $30.00
Hat: $10.00
Shirts: 2 * $5.00 = $10.00

Total cost before discount = $30.00 + $10.00 + $10.00 = $50.00

Next, let's calculate the discount amount:
Discount = 30% of $50.00 = 0.30 * $50.00 = $15.00

Now, let's subtract the discount from the total cost:
Total cost after discount = $50.00 - $15.00 = $35.00

To find the bills Stan received as change, we need to subtract the total cost from the amount he paid:
Change = $50.00 - $35.00 = $15.00

From the given information, we know that Stan received three of the same types of bills as change. To determine which bills those were, let's consider the common denominations of bills in the United States: $1, $5, $10, $20, $50, and $100.

If the change consisted of three $5 bills, it would be $5 x 3 = $15, which is the exact amount of change - so it is a possible combination.

If the change consisted of three $1 bills, the total change would be $1 x 3 = $3 - which is less than the given change.

Therefore, the bills that Stan received as change were three $5 bills.