Robert prepares his tax return each year. A tax preparer would charge him $75 for this service. Over a period of 10 years, how much does Robert gain from preparing his own tax
return, assuming he can earn 6 percent on his savings?

Asupermarket has been experiencing long lines during peak periods of the day. the problem is noticeably worse on certain days of the week, and the peak periods are sometimes different according to the day of the week. there are usually enough workers on the job to open all cash registers. the problem is knowing when to call some of the workers stocking shelves up to the front to work the checkout counters. how might decision models the supermarket? what data would be needed to develop these models?

2. which of the following statements about interest is true? a. interest is a one-time fee that you pay for lending money. b. interest is expressed as a percentage of the amount you are borrowing. c. because interest rates tend to be small numbers, they typically don't have much effect on the price of the goods you're purchasing. d. interest is a penalty that you pay when you don't pay your bills on time.

Mr. drucker uses a periodic review system to manage the inventory in his dry goods store. he likes to maintain 15 sacks of sugar on his shelves based on the annual demand figure of 225 sacks. it costs $2 to place an order for sugar and costs $1 to hold a sack in inventory for a year. mr. drucker checks inventory one day and notes that he is down to 9 sacks; how much should he order?