Susan wants to throw a party for her mom. She is planning on having 30 guests. For dinner she is making a recipe that makes 2 servings each. Each batch of the recipe calls for 4 potatoes and 1 teaspoon of salt. A potato costs $.10 and a container of salt costs $2 at the supermarket. If each container of salt has 5 teaspoons, how much money will Susan spend on food?
Susan needs to make 30/2=
<gadget id="calculator">30/2</gadget>
<output>15</output>
15 batches of the recipe.
Therefore, she will need 15*4=
<gadget id="calculator">15*4</gadget>
<output>60</output>
60 potatoes.
She will also need 1*15=
<gadget id="calculator">1*15</gadget>
<output>15</output>
15 teaspoons of salt.
Thus she will have to buy 15/5 =
<gadget id="calculator">15/5</gadget>
<output>3</output>
3 containers of salt.
Therefore, she will spend 60*$.1=$6 on potatoes and 3*$2=$6 on salt.
Thus, she will spend $6+$6=$
<gadget id="calculator">6+6</gadget>
<output>12</output>
12 on food.

<result>12</result>