Thank you for taking the time to do thatWhat about this? (I've mocked this up on a spare version I had lying around, so it's in dollars and the layout is a bit odd, but it should give you the idea.)
Arx in Dollars
Sheet1 Arx Calculator,GBP,Copyright © R Urwin Sept 2019 CC-BY-NC Price,Hours,2.99,4.99,9.59,12.99,24.99,44.99,purchase,0,5000,8820,17700,26800,54000,100000 Arx,5000,8400,16800,25500,51000,85000,0,2250,-2750,-6570,-15450,-24550,-51750,-97750 Bonus,0,420,900,1300,3000,15000,5000,-7750,-11570,-2045...docs.google.com