When is revenue earned?Is revenue earned from the following transactions? Give reasons for your answers.1Goods costing $7000 are sold for $9500.2Goods costing $7000 are sold for $7000.3Goods costing $7000 are sold for $4500.4A surveyor sends an account for $15 000 to a builder for work in connection with a subdivision of a block of land.5An electrical store provides a free service on a television set during the warranty period. The cost to thestore was $250.6A company receives a dividend of $8000 on one of its investments.7Goods costing $1000 are sold for $1600. Instead of paying for the goods, the customer cleans the storeswindows. This cleaning is normally carried out by an outside contractor at a cost of $1600.