Assume SeatComfy Inc

Multiple Choice

Assume SeatComfy Inc. estimates the demand for its table chairs to be Q = 5,000 - 25P + 4I +10P_A - 15 P_T, where P = the price of SeatComfy's chairs; P_A = average price of competitors' chairs; P_T = price of tables; and I = average income of SeatComfy's customers. Which of the following is true?

A) SeatComfy's chairs are inferior goods; SeatComfy's chairs and tables are complements, while SeatComfy's and competitors' chairs are substitutes. SeatComfy's sales decrease by 250 units for each $10 increase in their own price.
B) SeatComfy's chairs are normal goods; SeatComfy's and competitors' chairs are substitutes, while SeatComfy's sales are not affected by the pricing decisions of tables' producers. SeatComfy's sales increase by 50% if the price decreases by $2.
C) SeatComfy's chairs are a normal good; SeatComfy's chairs and tables are complements, while SeatComfy's and competitors' chairs are substitutes. SeatComfy's sales decrease by 25 units for each dollar increase in price.
D) SeatComfy's chairs are a normal good; SeatComfy's chairs and tables are complements, while SeatComfy's and competitors' chairs are substitutes. SeatComfy's sales decrease by 250 units for each dollar increase in price.