'Cash purchases' means any payment you make to suppliers with whom you do not have an account. As you don't have an account, you will have to pay for the goods at the time when you buy them.
For example, you might occasionally make Cash purchases from your local farm supplier or agricultural machinery dealer or from a local hardware or DIY shop.
Cash purchases only include items that you buy for use in turfgrass crop production. They don't include things like business stationery.
Remember to keep safely all the invoices and receipts for Cash purchases, even if the amounts are small.