A company is dedicated to the manufacture of Blu-ray and LED screens. In 2012, produced 40,000 and 25,000 units respectively, with 45 and 25 workers. After of a productive reorganization, 30,000 and 50,000 units were produced with 39 and 31 workers.
a. Calculate productivity in each of the years of Blu-ray manufacturing and LED screens.
b. Calculate the increase or decrease in productivity for each product.
c. Assuming that the value of LED screens is 30% greater than that of Blu-Rays, calculates the variation of global productivity.