Bunuel wrote:
An electrical supplies store sells 140 power stabilizers every week. If each power stabilizer costs the store $16, what is the minimum selling price per unit that will ensure a weekly profit of at least $5600 from sales of power stabilizers?
A. 24
B. 26
C. 40
D. 56
E. 60
Let x = the selling price per unit
So, x - 16 = the PROFIT on ONE unit
And
140(x - 16) = the PROFIT on the sale of 140 units (aka the weekly profit)
What is the minimum selling price per unit that will ensure a weekly profit of at least $5600 from sales of power stabilizers?In other words, we want: weekly profit ≥ 5600
Or we can write:
140(x - 16) ≥ 5600
Divide both sides by 140 to get: x - 16 ≥ 40
Add 16 to both sides to get: x ≥ 56
So, the selling price per unit must be $56 or greater
Answer: D
Cheers,
Brent
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