Sienna wants to set up a special fund so she can save to buy presents for her friends and family throughout the year. If her gift purchases last year totalled $580, estimate how much she should save each month to have approximately the same amount available for gifts next year

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