Acarpenter sells desks for $30 each and, at this price, sells 100 desks per month. the carpenter estimates that for each $5 increase in price, she sells 10 fewer desks per month. if the desks are manufactured at a cost of $2 per desk, at what price should they be sold to generate the greatest possible profit?

$47

Step-by-step explanation:

Selling price of desk =  p, $30

Cost price of desk = c,  $ 2

Number of desk sold = d , 100

Profit (π₁) =   d (p-c) (1)

         π₂   =   (d-10) [(p+5)-c](2)

At  greatest profit    Δ π  = 0

(d-10) [(p+5)-c]  - [d (p-c) ] =0 (3)

Substituting into (3)

(100-10)[p+5- 2] - [100(p-2)] =0

90 [p+5-2]- [100p-200] =0

90p +450-180-100p+ 200=0

90p- 100p = -450+ 180-200

-10p = -470

p=   $47

To make the greastest possible profit,  the carpenter should sell each desk for $47

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