Amazon is considering adding a fleet of drones to its company. These drones cost $2,000 each. Each drone is expected to generate an annual revenue of $800 and has a useful life of 3 years. After 3 years of operation, it has negligible salvage value. What is the external rate of return for each drone? Assume Amazon's MARR is 12%. Click here to access the TVMFactor Table calculator. Carry all interim calculations to 5 decimal places and then round your final answer to 1 decimal place. The tolerance is 0.2. Should Amazon invest in these drones