One is "materials" which are vendor invoices, receipts, and materials.

If there is a surplus, we provide the tenant with the option of leaving it in the fund (i.e. if winter is approaching and the bills are expected to grow); applying it towards the next month's rent or, if at the end of the lease, refunding it.If there is a deficit, we invoice the tenants and the amount is due at the start of the following month.