varying a dollar amount with a percentage

Kind of stuck here:

I want the user to input in cell C16 a dollar amount. If the dollar amount is less than $125 the output in cell C17 should show 35%, between $125 and $299 the output should be 22%, over $299 the output should be 17%

Can someone help me out? Thanks!

also to throw in a twist. Within each of those above categories I would like for every variation of $10 the percentage to go up or down accordingly 1%

any and all guidance would be GREATLY appreciated

thanks, i realize the math doesnt work out now, but once i have the correct formula i can play around with the numbers. Thanks for the base equation but if you know how to integrate the variation within the category that would be terrific

You can add all the breakpoints and rates that you wish to the previous formula.