Need help with a Different price - Different discount formula

Hi Everyone
I am looking for someone to help me with a formula to achieve the following.

I am a printing company. I sell stickers. what I am trying to have a formula for figure pricing.
the more stickers my customer buys the more discount they get.

for example:
2" X 2" stickers
50 stickers = $58
100 stickers = $70 - 40% discount
200 stickers = $92 - 60% discount
300 stickers = $112 - 68% discount
500 stickers = $147 - 75% discount
1,000 stickers = $225 - 81% discount
2,000 stickers = $225 - 84% discount
3,000 stickers = $225 - 86% discount
5,000 stickers = $225 - 88% discount
10,000 stickers = $225 - 90% discount

if the size of the stickers changes, the price, and the discount percentages changes as well.

you can see a sample of a company that has achieved it.
___stickermule.com/products/kiss-cut-stickers___
I am creating a website and I would like to do achieve the same. So I am looking for an excel formula.
I have tryed but cant figure it out. I really need help

I will appreciate if you can help me with this. I am also willing to monetary repay anyone that can help me.

Best regards,
Stuart

Thank you for your reply. I really appreciate. I have 4 to 5 set sizes but will also have the option to custom size. same thing with quantities. will have 6-7 set quantities but also have the option to custom quantities.Attachment 665533
if you see in this picture you can see what I mean as well as where you can find a working site where I found it.
The way this website does it is the following:
when you choose a size
you get a price for quantities
the higher the quantities the more discount percentage you get.

but every size you choose the prices per quantities are different as well as the discount percentage.
I think they either do the math by the square inch or a formula that I cant seem to find.

I really appreciate your help.