Kenny wants to buy three shirts, which were originally priced 49.96 each. the store will discount the price of the third shirt and then apply a 7.1% tax to the total cost of all three shirts including the tax, what will be the mean cost of each shirt

Assuming that the discount of the third shirt is 50 %
It means kenny paid (0.5×49.96) for the third shirt which is 24.98
For the first three shirts he paid 49.96
The total cost would therefore be;
 49.96+49.96+24.98 = 124.9
Adding a tax of 7.1% the total cost becomes;
1.071 ×124.9 = 133.7679
The mean cost per shirt will therefore be;
 133.7679/3
= 44.5893
≈44.59