Eric Swift, a plant manager, is concerned about plant productivity. He has requested and received the following cost and sales data from accounting. Sales Material Labor Overhead Month 1 $63,000 $15,000 $14,000 $18,000 Month 2 70,000 $15,900 $15,000 $25,200 Month 3 $77,000 $17,400 $16,200 $29,100 Month 4 $80,000 $18,050 $16,700 $33,000 Compute TFP for each of the four months above. What is happening to plant productivity based on this measure? (4 points) Some members of plant management have claimed that productivity is declining because of the workers. How would you respond to this? Back your response up with labor productivity data, (4 points)