The sale price of the calculator is $22, and it's sold at a 75% discount.
Let's denote the original price of the calculator as "x".
Since the sale price is 75% off, this means the customer pays only 25% of the original price. In other words, 25% of "x" is equal to $22.
Mathematically, we can write this as:
0.25 * x = 22
To find the original price "x", we divide both sides of the equation by 0.25:
x = 22 / 0.25
Calculating this gives us:
x = 88
So, the original price of the calculator was $88.
