plan to select. The "regular" plan charges a fixed fee of P55 per month for 1,000 minutes of e plus P0.33 per minute for any time over 1,000 minutes. The "executive" plan charges a fee of P100 per month for 1,200 minutes of airtime plus P0.25 per minute over 1,200 es. . If Perla expects to use the phone for 21 hours per month, which plan should she select? At what level of use would Perla be indifferent between the two plans?

Corporate Fin Focused Approach
5th Edition
ISBN:9781285660516
Author:EHRHARDT
Publisher:EHRHARDT
Chapter4: Time Value Of Money
Section: Chapter Questions
Problem 32P
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7.
Perla Santos has decided to purchase a cellular phone, but she is unsure about which
rate plan to select. The "regular" plan charges a fixed fee of $55 per month for 1,000 minutes of
airtime plus 0.33 per minute for any time over 1,000 minutes. The "executive" plan charges a
fixed fee of 100 per month for 1,200 minutes of airtime plus 0.25 per minute over 1,200
minutes.
a. If Perla expects to use the phone for 21 hours per month, which plan should she select?
b. At what level of use would Perla be indifferent between the two plans?
7
Transcribed Image Text:7. Perla Santos has decided to purchase a cellular phone, but she is unsure about which rate plan to select. The "regular" plan charges a fixed fee of $55 per month for 1,000 minutes of airtime plus 0.33 per minute for any time over 1,000 minutes. The "executive" plan charges a fixed fee of 100 per month for 1,200 minutes of airtime plus 0.25 per minute over 1,200 minutes. a. If Perla expects to use the phone for 21 hours per month, which plan should she select? b. At what level of use would Perla be indifferent between the two plans? 7
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