To pursue her goal of being a business owner, Mary left a job that paid $40,000 per year. At the end of her first year in business, her cash revenues summed to $90,000, and her explicit costs were $50,000. Also, in order to fund her business startup, Mary cashed in a $20,000 certificate of deposit that was providing a yield of 5%. Ceteris paribus, Mary's economic profit is:

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.