a) Write an expression to represent the price of each necklace

b) Write an expression to represent the number of necklaces sold per week.

c) Use your answers in a) and b) to write an expression that represents Olivia's revenue from the sales of her necklaces.

d) Write an expression to represent the cost of the materials for the necklaces.

e) Use your answers from c) and d) to write an equation for Olivia's profit

f) What selling price will give Olivia the largest profit?

g) What will her profit be?

h) How many necklaces must she sell to earn this profit?

There was a similar example that covered a-c of this question so I tried to do it the same way to start and then I'm not sure what to do or if that is the right way to do a-c, I used x as the number of price increases:

a) Price=8+0.5x

b) Sales=40-4x

c) Revenue=(8=0.5x)(40-4x)

d) Cost=4(40-4x) ???

e) Profit=Revenue-Cost ???

And I'm not sure if these are correct and if they are what to do next? Please help! Thank you!