Let's analyze the problem step-by-step.

Given:

• Monthly fixed cost = 00 (likely missing a digit, but let's assume it's 0 for now)
• Cost per minute = p8
• Total bill = p1,420

Goal:

Find the number of minutes used.

Solution:

If the monthly fixed cost is 0, then:

Total bill=(cost per minute)×(number of minutes)\text{Total bill}=(\text{cost per minute})\times (\text{number of minutes})Total bill=(cost per minute)×(number of minutes)

1420=8×minutes1420=8\times \text{minutes}1420=8×minutes

minutes=14208=177.5\text{minutes}=\frac{1420}{8}=177.5minutes=81420​=177.5

Interpretation:

• You used 177.5 minutes to get a bill of p1,420 at p8 per minute.
• If the fixed monthly cost is not zero, please provide the correct amount to adjust the calculation.

If you clarify the fixed monthly cost, I can give a more precise answer!