Use the following to answer question: 
-(Table: Variable Costs for Lawns) Use Table: Variable Costs for Lawns.During the summer,Alex runs a lawn-mowing service,and lawn-mowing is a perfectly competitive industry.Assume that costs are constant in each interval;so,for example,the marginal cost of mowing each of the lawns from 1 through 10 is $10.Also assume that he can only mow the quantities of lawn given in the table (and not numbers in between) .His only fixed cost is $1,000 for the mower.His variable costs include fuel,his time,and mower parts.If the price for mowing a lawn is $60,how much is Alex's total cost at the profit-maximizing output?
Definitions:
Yearly Payment
An amount of money that is paid once every year, often related to loans, leases, or other financial agreements.
Interest Rate
The amount charged by lenders to borrowers for the use of assets, expressed as a percentage of the principal.
Coupon Bond
A bond that entitles the holder to receive periodic interest payments (coupons) and the principal back at maturity.
Effective Yield
Effective yield is the total yield on an investment, taking into account the effects of compounding interest or reinvestment over a given period.
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