PLEASE HELP DO NOT WASTE ANSWERS URGENT

Who is not spending wisely? erika goes shopping and saves her receipts. she totals how much she spent and writes it down. mia needs to buy a new pair of shoes because she joined the soccer team. she looks at newspaper ads to find the best price. lauren has been thinking about getting a puppy for a long time. she walks by the pet store at the mall and decides to get a puppy. erin makes a purchase online using a credit card. she knows that she can pay the entire bill when it arrives.

Bakery has bought 250 pounds of muffin dough. they want to make waffles or muffins in half-dozen packs out of it. half a dozen of muffins requires 1 lb of dough and a pack of waffles uses 3/4 lb of dough. it take bakers 6 minutes to make a half-dozen of waffles and 3 minutes to make a half-dozen of muffins. their profit will be $1.50 on each pack of waffles and $2.00 on each pack of muffins. how many of each should they make to maximize profit, if they have just 20 hours to do everything?

Perry is a freshman, he estimates that the cost of tuition, books, room and board, transportation, and other incidentals will be $30000 this year. he expects these costs to rise about $1500 each year while he is in college. if it will take him 5 years to earn his bs, what is the present cost of his degree at an interest rate of 6%? if he earns and extra $10000 annually for 40 years, what is the present worth of his degree.?