part a and b are correct - i need c please!!

Labor: Lilian Fok is president of Lakefront Manufacturing, a producer of bicycle tires. Fok makes 1,000 tres per day with the following resources: 400 hours per day @$12.00 per hour Raw Material: 21,000 pounds per day @ 51.50 per pound Energy: $5,250 per day Capital: $10,250 per day a) Labor productivity per labor hour for these tires 25 tires/abor hour (round your response to two decimal placos). b) Multifactor productivity for these tires - 0193 tire/dollar (round your response to four decimal places). c) The percent change in multifactor productivity Fok can reduce the energy bill by $280 per day without cuting production or changing any other inputs = []% forte your response as a percentage rounded to two decimal places). Note: calculate the new multifactor productivity to your decimal places before calculating the percentage change