Answer:
The total cost is
.
Explanation:
Given: Original price of calculator is
, discount is
and the sales tax is
.
To find: The total cost
Solution:
We have,
Original price of calculator

Discount

Sales tax

Now, first we need to find the cost after applying the discount.
So, discount

Therefore, the cost after applying the discount

Now, we have to find the sales tax. Therefore,
Sales tax

So, the total cost is
.
Hence, the total cost is
.