Need help on a 2,3, and 4 questions

Parents with young babies buy a lot of diapers (to say the very least), so getting the best deal is pretty important. Comparing prices can be harder than you would think, though - retailers don't all sell diapers in the same size boxes. A recent check of prices on Pampers Swaddlers in Size I revealed the following: Amazon.com: 234 diapers for $46.99 Meijer: 160 diapers for $34.99 1. Find the unit price for each box of diapers and use it to decide which is the best deal. (There's free shipping, so don't worry about shipping or tax. ) Ammon 46.49 -234 -2.97 Mciyoga 34. 49% - 160 - 457 Merger is the best deal at $4.57 per-the box of diupers Amazon offers an interesting deal: If you pay $99 per year to join their Amazon Family club, you get 20% off all diaper purchases. 2. What would the $46.99 box of diapers cost with that discount? 46 94 + 0. 20 = 9.3 3. Write an equation that provides the total cost C of buying x boxes of diapers in one year with the Amazon Family membership. 4. Write another equation that provides the total cost C of buying x boxes of diapers in one year from Amazon without being a member of Amazon Family