4. You are now considering starting up a food truck business in Beppu. The expected cost of startup, including purchasing the truck, is estimated to be 4,000,000 yen. If the discounted cashflows over six years, which coincides with the life of the truck, is 1,000,000, 900,000, 800,000, 700,000, 600,000 and 500,000 yen respectively, the net present value of the investment is yen (in units, no 1000 separators)