How to solve this question ?

Problem 5: Eric Johnson makes billiard balls in his New England plant. With recent increases in his costs, he has newfound interest in efficiency. Eric is interested in determining the productivity of his organisation. He would like to know if his organisation is maintaining the manufacturing average of 3% increase in productivity. He has the following data representing a month from last year and an equivalent month this year. Last Year New Units produced 1000 1000 Labor (hours) 300 275 Resin (pounds) 50 45 Capital invested (S) 10,000 11.000 Energy (BTU) 3,000 2.850 a. Show the productivity percentage change for each category and then determine the improvement for labor-hours, the typical standard for comparison b. Eric Johnson determines his costs to be as follows: Labor @ $10 per hour, Resin S5 per pound, Capital expense 1% per month of investment and Energy S0.50 per BTU. With this information, Show the percent change in productivity for one month last year versus one month this year, on a multifactor basis with dollars as the common denominator