Answer:
He spent $1005.7893 on his study
Explanation:
At first, let us find the total of all items he bought
∵ The price of the desk = $437.50
∵ The price of the chair = $92.75
∵ The price of the filing cabinet = $99.99
∵ The price of the bookshelf = $309.75
→ Add all of them up
∴ The total price = 437.50 + 92.75 + 99.99 + 309.75
∴ The total price = $939.99
∵ He paid a 7 percent sales tax
∴ The tax = 7%
→ If the total price is 100% add it by 7% to find the amount that he paid
∵ The total price after added the sale tax = 100% + 7% = 107%
∴ He paid = 107% of $939.99
∴ He paid =
× 939.99
∴ He paid = 1005.7893
∴ He spent $1005.7893 on his study