Grayson is planning on opening his own landscaping business. he currently earns $40,000 per year working for his uncle but grayson will need to quit that job if he wants to open his own business. he hires one employee at an annual wage of $20,000. grayson plans to use $20,000 in savings to pay for the equipment he needs, and the market value of the equipment at the end of the year is $15,000. the current interest rate on savings is 5 percent. grayson also buys $5,000 of services from other firms. grayson predicts that the revenue from the new landscaping company is $150,000 a year. what is total opportunity cost incurred by grayson in opening his own business?