Entity A is a listed company in Hong Kong. It sells 3D printers. It also offers installation and technical support services to its clients. The stand-alone selling prices of each product are shown below. The sale price of a 3D printer is $230,000. The installation service price is $120,000 and the one year's technical support service price is $150,000. Entity B bought a 3D printer including installation and technical support services on 1 June 2020 and was charged a reduced price of $450,600. Entity A only reduces its price when customers purchase a package of products together. REQUIRED: Measure the revenue earned from Entity B for the year ended 31 March 2021. ANSWER: Revenue = $