You Can Sell 90 Pet Chias Per Week If They $q = - 50 p + 140$

Multiple Choice

You can sell 90 pet chias per week if they are marked as $1 each, but only 40 per week if they are marked $2 per chia. Your chia supplier is prepared to sell you 25 chias per week if they are marked $1 per chia, and 75 per week if they are marked $2 per chia. Write the associated linear demand and supply functions.

A) $q = - 50 p + 140$ , $s = 50 p + 25$
B) $q = - 50 p + 140$ , $s = - 50 p + 25$
C) $q = - 50 p + 140$ , $s = 50 p - 25$
D) $q = - 50 p - 140$ , $s = - 50 p + 75$
E) $q = 50 p - 140$ , $s = - 50 p - 75$