State whether you think a business would recognise the following as revenue. When would it be recognised?

a Cash sale by business $20 000 b Sale of excess equipment by a restaurant $350 c Hairdressing services for which clients paid cash $120 d Sale of goods on credit by a retailer $180 e A printer received deposit on an order to print stationery for a client $200 f A real estate business receives commission on advance of a sale of a house $3000.