Typical costs per earnings

Here are some figures i came up with, i have tried to keep them as simple as possible for this posting, if anyone wants the spread-sheet that was used to generate them, I am sure admin will oblige.

I will split them into two tables, based on earnings of £10 and £15 per hour.
Both tables assume you earn £1 for every mile travelled
and fuel costs are £16 per 100 miles. A year is based on 50 weeks.

OFFICE RENTED CAR, BASED ON £10 PER HOUR
hours..income....miles......fuel........rent....net-wage...per-hour
40.......£400........400.......£64........£250........£86......£2.15
50.......£500........500.......£80........£250......£170......£3.40
60.......£600........600.......£96........£250......£254......£4.23
70.......£700........700.......£112......£250......£338......£4.83
80.......£800........800.......£128......£250......£422......£5.28

OWN CAR, £10 PER HOUR,..HMRC BASED RUNNING COSTS
hours..income...miles..car-costs......rent...net-wage....per-hour
40.......£400.......400......£130.........£100......£170.......£4.25
50.......£500.......500......£155.........£100......£245.......£4.90
60.......£600.......600......£180.........£100......£320.......£5.33
70.......£700.......700......£205.........£100......£395.......£5.64
80.......£800.......800......£230.........£100......£470.......£5.88

=========================================================

OFFICE RENTED CAR, BASED ON £15 PER HOUR
hours...income.... miles......fuel......rent......net-wage...per-hour
40.......£600........ 600........£96.......£250.......£254.......£6.35
50.......£750........ 750.......£120......£250.......£380.......£7.60
60.......£900........ 900.......£144......£250.......£506.......£8.43
70.....£1,050......1050.......£168.......£250.......£632.......£9.03
80.....£1,200......1200.......£192.......£250.......£758.......£9.48

OWN CAR, £15 PER HOUR,..HMRC BASED RUNNING COSTS
hours..income.... miles...car-costs..rent....net-wage....per-hour
40.......£600.......600......£180......£100......£320.......£8.00
50.......£750.......750......£218......£100......£433.......£8.65
60.......£900.......900......£255......£100......£545.......£9.08
70......£1,050....1050.....£293.......£100......£658.......£9.39
80......£1,200....1200.....£330.......£100......£770.......£9.63