Cassandra, the sales manager at a jewelry store, receives a commission of 30% of her...

Cassandra, the sales manager at a jewelry store, receives a commission of 30% of her sales. In addition, she receives a commission of 4.5% of the total sales of other salespeople under her supervision.

If Cassandra sells jewelry worth $2250 and her sales staff sells jewelry worth a total of $6800, what is her total commission in dollars?