In December, Textra Motors produced 16,600 customized SUVs at its plant in New Mexico. The labor productivity at this plant is known to have been 0.18 SUV per labor-hour during that moth. 540 laborers were employed at the plant that month. How many hours did the average laborer work that month? Next month, Textra will still produce 16,600 SUVs. However, the operations leas believes that she can increase productivity to 0.21 SUVs per hour. If that productivity increase is attained, how many hours would the average laborer have to work that month?