assume the contract has a 6-month duration. the cost of borrowing money is 1% per month. under the terms of the contract, the owner will pay the total bid amount 30 days after the end of project as a single payment. estimated cost is 600,000. using 15% markup, the contractor bis $690000. expected monthly cost are as shown below

cost 1st month: 60,000

cost 2nd month: 120,000

cost 3rd month: 120,000

cost 4th month: 120,000

cost 5th month: 120,000

cost 6th month: 60,000

using the above information calculate the following

a. cost

b. amount invoices

c. amount received

d. interest

e. cash requirements