At 31 March 2015, the deferred consideration of $12,650 would need to be discounted by 10% for one year to $11,500 (effectively deferring a finance cost of $1,150). The total amount credited to profit or loss would be $24,150 (12,650 + 11,500).
The method of apportioning general fixed costs is not required to calculate the break-even sales revenue.