You have the following capital budgeting timeline with their periods and cash flows: 0 = ?, 1 = $4500, 2 = $4900, 3 = ?, 4 = ?, 5 = $4000, 6 = $3750. The terminal value of the project is $34,806.73. The NPV = $1311.33 and the cash flow in period 4 can decrease by $1847.66 and the project remains minimally acceptable. What is the amount of the initial cash outflow at period 0? The cash flows in periods 3 and 4 are positive.