A pet store sold a whopping amount of 15 pets in a day. The pet store sold only dogs and cats. Each dog was marketed for $150 while cats were sold at a price of $120. If the store made a profit of $2070, how many dogs were sold? How many cats were sold? Write and solve a system of equations to find out the problem using the following methods: Elimination, substitution, and graphing. Check your answer.