Ralph and Jody go to the store to buy chips and candy bars. Ralph buys 3 bags of potato chips and 4 candy bars for 375 cents. Jody buys 6 bags of potato chips and 4 candy bars for 600 cents. Later, Maria meets up with Ralph and Jody. She wants to buy one bag of potato chips and one candy bar from them. Ralph and Jody need to figure out what the charge her for the items. Write a system of equations that will help Ralph and Jody figure out the price of each item. Explain.