An elementary school teacher is making Halloween goodie bags for her class.  She wants the bags to be personalized, so she surveys her students asking whether they'd like a vampire-themed bag or a pumpkin-themed bag.  Of her 25 students, 11 indicate they want the vampire-themed bag and 14 indicate they want the pumpkin-themed bag.  The store the teacher shops at sells packs of 5 of each theme at a price of $3 per package, as well as individual bags of each theme at a price of $1 each.  What is the least amount of money the teacher can spend on the bags if she buys every student the theme they requested?
Please reason step by step, and put your final answer within \boxed{}.
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