We should do the same.
Window Cleaning Bill
________________________
Glass cleaned per sq/cm: 400
sq/cm rate A £0.20
sq/cm rate B £0.30
sq/cm rate C £0.40
-------------------------
Chargable breakdown
Rate A £20
Rate B £60
Rate C £40
SUB TOT £120
-------------------
Water use: 72 litres
Charge per litre 0.20
SUB TOT £14
-----------------
Market Adjustments
--------------------------
Window cleaner saturation ratio 200:1
Loyalty Discount 20%
Property Access Discount 20%
SUB TOT £42.88
Labour 20mins @ £5/min £100
Cake & Tea Credits £-50
SUB TOT £92.88
MINUS Customer kindness credits: 80 units at 1 unit per £1
Total due £12.88