please i need one line explanation for the answer

Answer question 8 to 10 using the following information: Medro & Mariana serve one kind of sandwich, one kind of cheesecake, and one size of coffee. > On the average they sell: 250 pieces of cheesecake per week 400 sandwiches per week 600 coffee drinks per week > They sell each: piece of cheesecake for 2 KD sandwich for 3 KD cup of coffee for 1.750 KD > They have 6 employees each employee works 6 days a week each employee is paid 4 KD/hr each employee works 8 hrs/day each employee is paid 192 KD/wk > overhead costs = 600 KD/wk > total weekly material costs = half of the total labor cost = 0.5(total labor cost) What is their material-productivity approximately equal to? a. 4.774 O b. 0.562 c. 0.025