this is the question i am trying to solve

here are the formula examples given but i cant figure out which ones to use

i have posted before and they got it wrong with 1.69

3 Question 23 1 pts Happy Baby Inc. produces low cost, highly durable strollers for babies. Typically, out of the 100 units that begin production each month, only 85 percent are considered good enough to sell. The other 15 percent are scrapped due to quality problems that are identified after they have completed the production process. Each stroller sells for $300. Because some of the production processes are automated, each unit only requires 5 labor hours. Labor is paid at $12 per hour, materials cost is $40 per unit, and overhead is $11,000. What is the current multifactor productivity ratio? (Enter your response rounded to two decimal places.) Exercise Problem 5-7 Fullerton Fitness Inc. produces low cost, highly durable home gym equipment for beginners. Typically, out of the 100 units that begin production each month, only 90 percent are considered good enough to sell. The other 10 percent are scrapped due to quality problems that are identified after they have completed the production process. Each home gym unit sells for $1,000. Because some of the production process is automated, each unit only requires 10 labor hours. Each employee works an average of 160 hours per month. Labor is paid at $10 per hour, materials cost is $320 per unit, and overhead is $12,000 (estimated at 1.2 times the labor cost). The multifactor productivity ratio is? (Enter your response rounded to two decimal places.) 90x$1000 1.67 100x10x$10+ 100x$320 + $12,000 Exercise Problem 5-7 (continued) Evaluate the following three scenarios independently based on the current multifactor productivity. (Enter your response rounded to two decimal places.) What is the new multifactor productivity ratio if the sales price is increased by 20%? 90x$1200 100x10x $10 + 100x$320 + $12,000 = 2.00 What is the new multifactor productivity ratio if the quality is improved so that only 5% are defective? 95x$1000 1.76 100x10x$10 + 100x$320+ $12,000 Exercise Problem 8-9 Student tuition at Great University is $150 per semester credit hour. The state supplements school revenue by $50 per semester credit hour. Average class size for a typical 3-credit course is 45 students. Labor costs are $4,000 per class, materials costs are $20 per student per class, and overhead costs are $22,000 per class. The multifactor productivity ratio currently is 1.00 and the labor productivity ratio is $120.54 per hour if the instructors work on an average of 14 hours per week for 16 weeks for each 3-credit class of 45 students. Exercise Problem 8-9 (continued) To improve its finance, the university decided to change its tuition and class size. The new overhead costs will be $31,000 per class section. Labor costs will increase to $6,000 per 3-credit course. Material costs will be about $25 per student for each 3-credit course with an average class size of 70 students. Tuition will be $190 per semester credit, which is supplemented by state support of $50 per semester credit. If instructors are going to work an average of 20 hours per week for 16 weeks for each 3-credit class of 70 students, what would be the new labor productivity (in terms of dollar per labor hour) for a 3-credit course? (Enter your response rounded to two decimal places.) ($190 + $50)x3x70 20x16 - 157.50 dollar / labor hour