Answer
50 jars
Work Step by Step
Let x be the number of jars
Cost of a jar: $\frac{4}{5}$(3.00)+$\frac{1}{5}$(6.00) =2.4+1.2=3.6
Expense is the cost of number of jars +the cost of material =>Expense=y=3.6x+70
Income: y=5x
To break even, expense is equal to income
3.6x+70=5x => 70=1.4x => x=50 (Divide both side by 1.4
Therefore to break even, the person has to sell 50 jars.
