you need to re read the relevant chapter of your course book
you will be covering a variety of costing methods ( all or which fail me - ABC activity based costing is the really crappy one)
the whole point is not find out what a sarny costs but to exercise YOU in costing exercises
so say a loaf of bread - £1 ( but it is rand for you innit?)
and the butter - oh god 50 p
and cheese - £3
and this makes so many (40) sandwiches
these are variable costs and so they go up as your order increases ( oh and labour costs)
buut you will have fixed costs - insurance, rent of rooms, water rates and so on - elec
these are fixed - but go down for each sandwich if you make 100 rather than 40
then you sort of tot then up and work out each cost for one sarny
-
BUT you need to do your chapter because
you also gonna do marginal costing - where the fixed costs are tacked on at the very end
because it allows you to double treble easily ( you just x2 or x3) so is a very easy method to increase ....
well that is three innit
ABC
and usual costing
and marginal costing
honestly you need to read the course book .....
and what ever you do dont do AAT - it is truly a load of old .....