Should we expect this on the exam? thanks
There's not much guidance from VCAA on what they're expecting, because they don't provide official solutions to the sample exam.
However, I did have a quick look through the AASB standards (on which the course is based on) regarding Revenues from Contracts with Customers. The AASB is the Australian Government agency which issues the accounting standards that accountants have to follow!
https://www.aasb.gov.au/admin/file/content105/c9/AASB15_12-14_FP_COMPdec16_01-18.pdfPage 9 Paragraph 21(b) seems to suggest that when part of a transaction is fulfilled, and the remaining goods are not different, the transaction has only been partially satisfied. Therefore, any adjustments to revenue are made on a cumulative catch-up basis.
I think its suggesting that when only parts of a contract is fulfilled, the adjustments to the revenue are made gradually until it is fully satisfied. I'd recommend taking a close look through the document if you want some more guidance. Again its very unclear what VCAA is looking for.