Derby Transportation Inc. designs and builds trains for rail networks across Canada. The company, which is publicly traded, has an October $31$ year end. On March $15,2020,$ Derby Transportation signed a contract with OM Corridor Corp. to design and build $10$ high$-$speed trains, with each train consisting of seven passenger cars. The high$-$speed train will operate between Ottawa and Montreal The following events took place in $2020$ in relation to the contract:$1.$ March $15$: At the signing ceremony, officials from Derby and OM sign a contract, which is for $$10,240,000.$ Derby is to design, manufacture, and deliver the $10$ trains to OM's train yards in Montreal. Derby's management estimates that the design component of the contract would be valued at $$1,703,920$ if contracted for separately, while the manufacturing of the ten trains would be valued at a total $$9,506,080$ if they were purchased separately. Derby agreed to provide a two$-$year assurance$-$type warranty for the trains, and the company's management estimates that the warranty claims would total $$460,000$ based on experience. OM agrees to pay a $$5,540,000$ deposit within $14$ days of signing the contract and to pay the balance within $45$ days of the trains receiving final approval and certification from the Transportation Safety Board$\mathrm{.}2.$ March $29$: OM pays the deposit specified in the contract$\mathrm{.}3.$ May $9$: Derby's engineering staff complete the train design and it is approved by officials from OM as well as theTransportation Safety Board$\mathrm{.}4.$ August $1$: Derby completes construction of the $10$ trains$\mathrm{.}5.$ September $1$: The $10$ trains are delivered according to the contract to OM's Montreal train yards$\mathrm{.}6.$ September $30$: After testing for safety compliance, the trains receive final approval from OM and the Transportation Safety Board and are certified to carry passengers$\mathrm{.}7.$ November $15$: OM pays the balance owing on the contract.