A regression line to predict the cost of a job is given by Y= 1000 + 1500X₁+ 40X₂,

where Y is the cost of the job in dollars, X₁ is the number of tons of raw material required, and X₂is the number of labor hours required. Give interpretations for the coefficients of X₁. How much do you expect a job requiring 2 tons of raw materials and 10 labor hours to cost?