customize the quantity discount

I need to customize the quantity discount. The way it function now like this below:

Our quantity discounts:

Quantity 3+ 5+

Price $86.33 $79.80

I want it reflect the discount this way:

Buy 3 for $258 and save $38

Buy 5 for $399 and save $96

Can you let me know how it is done.

Custom coding needed! :wink: