Answer:
-43 necklaces.
-total expenses=Sales=$473
Step-by-step explanation:
The breakeven point is the point where the sales revenue equals the expenditure.
-The fixed expenses is $172
-Let x be the number of necklaces sold, the breakeven point is expressed as:

Hence, Shelby has to sell 43 necklaces to breakeven.
#The expenses at the breakeven point is:

Hence, expenses at breakevent point is $473
#Sales is equal to expenses at this point, hence, sales of $473