Does anyone know the answer??

How many days was the temperature above 90 degrees?

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.

What is the sum of these mixed numbers 2 1/8 + 4 3/8