Good day

First post here. Hoping I can find some clarity here (have basic bookkeeping experience).

Company has to pay a supplier a deposit when placing an order for a product.

The product will be delivered about 3 weeks later. It will be installed at customer's address about a month after being received in store.

About 2 weeks after installation, the customer will be invoiced.

Business owner wants the prepaid purchases deposit and the customer sales invoice to be in recorded in the same month (so that his Profit & Loss doesn't look messed up).

How would I record this whole process, given the time between each step?

Thanks so much. 

Al