Costly Candy

Here are the cost of purchasing two different amounts of candy:

One chocolate bar and three lollipops Cost $9.75

Two chocolate bars and two lollipops Cost $9.50

Answer the following questions in complete sentences. You need to show or explain your mathematics for credit!!!!

Questions:
How much is one chocolate bar?
How much is one lollipop?
How did you find the cost of one lollipop and the cost of one chocolate bar?