Question 981837
Well 50% of 20 dollars is 10$ correct

25 percent of 10$ is 2.5$
25 percent of 2.5$ is 0.63 

So the total cost is 63 cents only if you have to find the percent of the shirt in order-of the discounts.

But if your adding all the discounts together equaling 100% off for the shirt then yes it will be free.