Savanna spent a total of $116 on 30 plates, 40 cups, and 4 packages of napkins. Matthew spent $1000 on 250 plates, 300 cups, and 50 packages of napkins. Justin spent $189 on 55 plates, 55 cups, and 6 packages of napkins.
Which system of linear equations could be used to determine the price of each type of party supply?