Accounting for services

hi, how would i account for services of non tangible inventory?
we received $30 for fixing a client curtain and spent $7 for the whole procedure (bought some stuff). note that one of our employees fixed it; whom we pay fixed salary.
should i only receive money in cash transactions
and spend money in cash transaction too ?

Yes, if they were cash transactions

Inventory cannot be non-tangible. Inventory is for physical goods only. You can set up non-inventory items if they are frequently sold, following the Guide: Manager Cloud.