The below table shows Senem's marginal utility of consuming chocolate bars and milkshakes. We can see from the table that she gets 8 utils from consuming her first bar of chocolate, 2 utils from the second, and 5 utils from the third. She also gets 2 utils from her first milkshake, 1 util from the second, and 6 utils from the third. If each bar of chocolate costs $ 3 and each milkshake costs $ 4 and Senem has $ 6 to spend on chocolate and milkshakes, what is her total utility from the purchase (assuming she wants to maximize total utility)? Unit Chocolate Bars Marginal Gain of Utility (utils) Milkshakes Marginal Gain of Utility (utils) 1st unit 8 2 2nd unit 2 1 3rd unit 5 6