Ann: Quarterly Activities Report & Appendix 4C (Apr - Jun 2020), page-42

your accounting assessment leaves out the cash element. If a deposit is made then an accounting entry should follow for the cash payment. Normally it’s dr - cash at bank cr- advances. When the machine is being made the accounting is dr - advances and cr- revenues based on how much of the machine is made.

The “sales tax” by which I presume you mean GST is accounted separately. Maybe cause you cut and pasted out of an American website.

anyway, normal practice, sensible practice for manufacturers is to receive ongoing payments from the vendor to meet the cost of manufacture. Especially if it’s a $25 mill order to be filled by a $100 mill company.