【正确答案】
1 Since the material is in regular use by HL Co, it is replacement cost which is the relevant cost for the contract.
2 30 m will have to be ordered from the alternative supplier for immediate delivery but the remaining 20 m can be used from inventory and replaced by an order from the usual supplier at a cost of $8·20 per m.
3 There is no cost for the first 150 hours of labour because there is spare capacity. The remaining 50 hours will be paid at time and a half, which is $16 x 1·5, i.e. $24 per hour.
4HL Co will choose to use the agency workers, who will cost $14 per hour, since this is cheaper than paying existing semi-skilled workers at $18 per hour ($12 x 1·5) to work overtime.
5 None of the general factory costs are incremental, so they have all been excluded. However, the supervisor’s overtime pay is incremental, so has been included. The supervisor’s normal salary, on the other hand, has been excluded because it is not
incremental.
6 These are general overheads and are not incremental, so no value should be included for them.
