If average household income increases by 50%, from $40,000 to $60,000 per year, the quantity of rooms demanded at the triple sevens from rooms per night to rooms per night. therefore, the income elasticity of demand is , meaning that hotel rooms at the triple sevens are . if the price of a room at the exhilaration were to decrease by 20%, from $200 to $160, while all other demand factors remain at their initial values, the quantity of rooms demanded at the triple sevens from rooms per night to rooms per night. because the cross-price elasticity of demand is , hotel rooms at the triple sevens and hotel rooms at the exhilaration are . triple sevens is debating decreasing the price of its rooms to $175 per night. under the initial demand conditions, you can see that this would cause its total revenue to . decreasing the price will always have this effect on revenue when triple sevens is operating on the portion of its demand curve.

The gilbert instrument corporation is considering replacing the wood steamer it currently uses to shape guitar sides. the steamer has 6 years of remaining life. if kept,the steamer will have depreciaiton expenses of $650 for five years and $325 for the sixthyear. its current book value is $3,575, and it can be sold on an internet auction site for$4,150 at this time. if the old steamer is not replaced, it can be sold for $800 at the endof its useful life. gilbert is considering purchasing the side steamer 3000, a higher-end steamer, whichcosts $12,000 and has an estimated useful life of 6 years with an estimated salvage value of$1,500. this steamer falls into the macrs 5-year class, so the applicable depreciationrates are 20.00%, 32.00%, 19.20%, 11.52%, 11.52%, and 5.76%. the new steamer is fasterand allows for an output expansion, so sales would rise by $2,000 per year; the newmachine's much greater efficiency would reduce operating expenses by $1,900 per year.to support the greater sales, the new machine would require that inventories increase by$2,900, but accounts payable would simultaneously increase by $700. gilbert's marginalfederal-plus-state tax rate is 40%, and its wacc is 15%.a. should it replace the old steamer? b. npv of replace = $2,083.51