Answer:
$-7033.54
Explanation:
Net present value is the present value of after-tax cash flows from an investment less the amount invested.  
NPV can be calculated using a financial calculator  
Cash flow = net income + deprecation 
Straight line depreciation expense = (Cost of asset - Salvage value) / useful life
($45,300  - $7,500) / 3 = $12,600
Cash flow = $12,600 + $2000 = $14,600
Cash flow in year 0 = $-45,300
Cash flow in year 1 =  $14,600
Cash flow in year 2 =  $14,600
Cash flow in year 3 =  $14,600 + $7,500 = $22,100
I = 15%
NPV = $-7033.54
To find the NPV using a financial calculator:
1. Input the cash flow values by pressing the CF button. After inputting the value, press enter and the arrow facing a downward direction.
2. after inputting all the cash flows, press the NPV button, input the value for I, press enter and the arrow facing a downward direction.  
3. Press compute