For the project whose data are shown below, plot the cumulative project expenditures, value of work, and progress payments received versus time. What is the contractor's maximum negative cash flow and when does it occur? Progress payments are calculated at the end of each month and received the middle of the following month. Retainage is 10% until project completion. Assume that final project payment, including released retainage, is received the middle of the month following project completion. Month End-of-Month Cumulative Expenditures Value of Work $14,400 $9600 28,800 24,000 49,200 45,600 4 72,000 69,600 102,000 76,800 144,000 144,000 210,000 216,000 276,000 288,000 9 288,000 300,000 294.000 312,000 295,200 321,600 12 296,400 330,000