Neptune Rentals offers a boat rental service. Consider the following costs of the company over the relevant range of 5,000 to $,000 hours of operating time for its boats: Hours of Operating Time 5,000 6,000 7,000 8,000 Total costs: Variable costs $ 20,000 $ ? $ ? $ ? Fixed costs 168.000 Total costs $ 188,000 Cost per hour: Variable cost $ ? $ ? $ ? $ ? Fixed cost ? 2 Total cost per hour $ $2 $ ? $? Required: Compute the missing amounts, assuming that cost behaviour patterns remain unchanged within the relevant range of 5,000 to 8,000 hours