The manager of company $A$ is thinking about adding an air conditioner to the office. The AC will cost $$1690$ to buy and install. The manager plans to use the AC for $5$ years and each year's depreciation rate is $10\%$ of the purchase price. The manager expects to sell the AC in $5$ years for $$330.$ The tax rate is $40\%$ and the company's WACC is $15\%.$ If the manager considers this purchase of $AC$ as an investment, what is the NPV $($keep two decimal places and assume that the AC will not affect the operations of the company$)?$