Draw the following cost behaviour charts:

i A supervisor’s salary.

ii Cost of raw materials at £15 per unit for the first 100 units, £10 per unit for the next 100 units and £5 per unit for the next 100 units.

iii Direct hourly labour with a 50 per cent surcharge for overtime.

iv The cost of water comprising an annual fixed charge and an amount for each cubic metre used.