Answer:
The difference in cost, in dollars, per ounce between the two boxes of cereal is $0.06.
Step-by-step explanation:
☆Let's solve using proportion.
☆One box:

☆Another box:

☆All we need to do is subtract: 
☆The difference in cost, in dollars, per ounce between the two boxes of cereal is $0.06.
You can multiply 10 by 1/4 or .25
10x.25=2.5
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The independent variable (the one they want) is the # of hours worked, since that determines the price.
All the other answers contain information not included in the problem