Abbott & Costello has the following estimated sales: first quarter $8,100, second quarter $8,600, third quarter $9,500 & fourth quarter $11,200. Purchases are equal to 75 percent of the following quarter's sales. What is the estimated amount of purchases for quarter 2?
A. $5,209
B. $5,508
C. $5,848
D. $7,125
E. $7,720