Babble, Inc., buys 405 blank cassette tapes per month for use in producing foreign language courseware. The ordering cost is $15.00. Holding cost is $0.25 per cassette per year.
a. How many tapes should Babble order at a time? Babble should order 764 tapes at a time. ?(Enter your response rounded to the nearest whole number.)
b. What is the time between orders? The time between orders is ______months. ?(Enter your response rounded to one decimal place.)