You may answer Q1, Q3b, and Q4 on a piece of paper and take a photo of your solution. Alternatively, you may type this out if you are comfortable with typing equations. Q2 and Q3b are to be submitted as an Excel file. Please save your files as HW2-XXXXXXXX.xlsx/.pdf/.doc as appropriate, where XXXXXXXX is your student id number.
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You make the hand sanitizer by combining lotion, soap, and secret ingredient SpecialX. These ingredients are purchased from a mysterious supplier, and you can purchase at most 4000L of lotion, 5000L of soap, and 750L of SpecialX in a month. Lotion costs