The football team is selling gift cards in increments of $25 and $50. If they sold $6,000 worth of gift cards which equation could be used to determine how many $50 gift cards, g, were sold if 180 gift cards were sold in the $25 amount?

A 4,500 + 50g = 6,000

B 25 + 50g = 6,000

C 4,500 - 50g = 6,000

D 25g - 50(180) = 6,000