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A cell phone company offers a plan that costs $30

Question: A cell phone company offers a plan that costs $30 per month and includes 5 GB of data. Each additional GB of data costs $10. If a customer uses 8 GB in one month, what is their total bill?
A) $60
B) $70
C) $80
D) $90

Solution:

Cost for the plan:
30
Cost for the additional data (3 GB):
3×10=30
Total bill:
30+30=60

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