John's workshop electric bills are $ 1000 a year. He wants to reduce them by using solar electricity, so he gets two quotes from solar panel manufacturers. The cost of GOTO Panels is $2,000 and the seller tells him that his electricity cost will be reduced to $250 per year. The GOTO Panels have a life of 10 years with a salvage value of 25% of the original price. Another solar company called SFB quotes that their solar panels will cost $4000 but will reduce the cost of electricity to $50 per year. SFB's panels have a life of 20 years and a salvage value of 50% the original price. Use present worth and the least common multiple of the service lives, to determine which company you should go with. MARR is 10%.