Sarah has decided that she never wants to go into debt. Therefore, she only uses her debit card and cash for purchases. The store where she is planning to purchase a dining
room set charges a 15% annual interest rate for all store credit card purchases. If Sarah
saves up the cash and uses her debit card to purchase her new $1,200 dining room set,
how much will she have to pay in interest?

Leading guitar string producer wound up inc. has enjoyed a competitive advantage based on its proprietary coating that gives its strings a clearer sound and longer lifespan than uncoated strings. one of wound up's competitors, however, has recently developed a similar coating using less expensive ingredients, which allows it to charge a lower price than wound up for similar-quality strings. wound up's competitive advantage is in danger due to a. a lack of perceived value b. a lack of organization c. direct imitation and substitution d. resource immobility