4 friends went to buy from a clothes shop. Every item was 50% off. All four friends decided to buy a t-shirt. The original price of the t-shirt was 20 dollars. How much money did they spend in total?
Step-by-step reasoning process below:
40
After the 50% discount, the t - shirt cost 20 * 0.

5 = $10.

So in all, the 4 friends spent 4 * $10 = $40.

.

Therefore, the answer is 40