Answer:
A). 3 Labors will produce 16 cakes which can be sold in $160 giving 25% profit margin which is the maximum profit.
Labors cost cakes Sales Profit %
1 40 3 30 -10 33%
2 80 10 100 20 20%
3 120 16 160 40 25%
4 160 21 210 50 24%
5 200 25 250 50 20%
6 240 28 280 40 14%
Explanation:
Please refer to the attached file for detailed calculation of profit margin.
Profit margin(Gross Profit/Sales) : is the ratio used to calculate to measure maximum profit.
Option A, 3 labors are delivering maximum efficiency in work and producing maximum number of cakes resulting in the highest profit margin.