A plan has a monthly base of $10 and a per-GB overage of $5. If you use 6 GB over the limit, what is the total charge?

A plan has a monthly base of $10 and a per-GB overage of $5. If you use 6 GB over the limit, what is the total charge?

• A. $5
• B. $20
• C. $35
• D. $40

Answer: (D)

The total charge combines a base fee with overage charges. You pay the monthly base of $10 plus 6 GB of overage at $5 per GB, which is 6 × $5 = $30. Add the base: $10 + $30 = $40. So the total is $40. The other amounts would come from different overage totals (for example, $5 would be 1 GB over with no base included, $20 would be 4 GB over, and $35 would be 5 GB over plus the base).

The total charge combines a base fee with overage charges. You pay the monthly base of $10 plus 6 GB of overage at $5 per GB, which is 6 × $5 = $30. Add the base: $10 + $30 = $40. So the total is $40. The other amounts would come from different overage totals (for example, $5 would be 1 GB over with no base included, $20 would be 4 GB over, and $35 would be 5 GB over plus the base).