The concert promoters of a heavy-metal band, WeR2Loud, know that there are two types of concert-goers: die-hard fans and casual fans. For a particular WeR2Loud concert, there are 1,000 die-hard fans who will pay $150 for a ticket and 500 casual fans who will pay $50 for a ticket. There are 1,500 seats available at the concert venue. Suppose the cost of putting on the concert is $50, 000, which includes the cost of the band, lighting, security, etc. How much profit will the concert promoters earn if they set the price of each ticket at $50?
A. $150, 000
B. $75,000
C. $25,000
D. $100, 000