The regular price of the sofa can be calculated using the information provided.
Let's start by assuming that the regular price of the sofa is represented by "x". Since the sofa is on sale for 76% off, this means that the sale price is equal to 100% - 76% = 24% of the regular price.
To find the sale price, we can set up the following equation:
0.24x = 153.60
To solve for x, we can divide both sides of the equation by 0.24:
x = 153.60 / 0.24
Performing the calculation:
x = 640
Therefore, the regular price of the sofa is $640.
Please let me know if there is anything else I can help you with.