How do you calculate the numbers under Overdarft @beginning? please show your calculations.

As a contractor you are bidding on a construction protect for a commercial building. You estimate the construction period as 4months and your direct cost to be $600,000 as shown In Figure 3. In addition to your direct cost, you estimate to accrue $4,000 Indirect cost for each month of the project. As standard practice you will send an invoice at the end of each month to the owner's representative and you will get paid after a one month review period. You will add 10% to each Invoice for profit. The contract Indicates that there will be a retainage of 10% on every payment and the retained money will be paid to the contractor together with the last payment. (Assume all costs and payments take place at the end of month and use 2 digits after comma for rounding-Use 6% annual Interest rate for bank loan). How much money will you end up with In the bank? Draw the cash flow diagram and show If this a good project for a MARR of 8% annual If the owner delays the payment for the Invoice of the 3^rd month by exactly 1 month (after the review period), how does your cash flow diagram change? is this still a good project