January 1, 2018, Company A entered into a contract with a customer to sell a machine for a total of $ 10,000. Included in the contract is that Company A must provide training on the use of the machine as well maintenance of the machine for two years. Another incentive in the contract was that Company A gave the customer a coupon worth $ 500 for future purchases. The machine has a normal selling price of $ 9,500. Company A normally includes the training on equipment it sells since it believes it is integral to the machine. However it estimates the training to be worth $ 500. Company A does not provide training on equipment they do not sell. The price of the two-year maintenance contract for the machine when sold separately is $1,500. The equipment was installed and the training provided on April 1, 2018. The customer used the coupon for another purchase on September 1, 2018.The $ 10,000 was received by Company A on April 30, 2018. Prepare the journal entries for Company A for the fiscal year end December 31, 2018 for the above transaction. IFRS is the constraint.