Solve the Problem $x$ Teams in a Sports League and All the Teams Play

Solve the problem.
-If there are $x$ teams in a sports league and all the teams play each other twice, a total of $N ( x )$ games are played, where $N ( x ) = x ^ { 2 } - x$ . A soccer league has 6 teams, each of which plays the others twice. If the league pays $\$ 49$ per game for the field and officials, how much will it cost to play the entire schedule?

A) $\$ 2058$
B) $\$ 1470$
C) $\$ 1764$
D) $\$ 1568$