Sarah buys 3 ice cream cones and 2 souvenir keychains at the amusement park. If the cost of each ice cream cone is $X and each souvenir keychain is $Y, what is the equation representing Sarah's total cost?
A) 3X + 2Y = Total Cost
B) 2X + 3Y = Total Cost
C) 5X + 2Y = Total Cost
D) 3X + 5Y = Total Cost
