plot {(1.73*floor[{1+x/2000}] + x*18/1000*0.07), (8.13*floor[{1+x/30000}]+x*2.5/1000*0.07)}, x=0..5000

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.