Find the selling price of an item listed at $400 subject to a discounted series of $25%, 10%, and 5%.

The final selling price is $256.50

Given:

Original Price = 400

1st discount = 25%

2nd discount = 10%

3rd discount = 5%

400 * 25/100 = 100 * 1st discount value

400 - 100 = 300 * net of 1st discount

300 * 10/100 = 30 * 2nd discount value

300 - 30 = 270 * net of 2nd discount

270 * 5/100 = 13.50 * 3rd discount value

270 - 13.50 = 256.50 * net of 3rd discount, Final Selling Price.