Pricing based on sheet lower the price higher the margin

Good Afternoon,

This is a new one and I'm lost! I'm trying to figure a formula or look up I believe. We are trying to create a sheet which would allow us to enter any price from $0.01 to $10,000.00 the return I'm looking for is based on a moving margin.

Example something that cost $.01 would return a sell price of $1.01 (99% mark up) however, something that cost $160.00 would sell for $266.67 (40% margin) The powers to be keep referring to a sliding scale price low higher mark up price high lower mark up. I'm lost and going nuts. Thank you for any incite.