Jenna is deciding between two cell-phone plans. The first plan has a $50 sign-up fee and costs $20 per month. The second plan has a $30 sign-up fee and costs $25 per month. If Jenna has to sign a one-year contract, which plan will be cheaper?

To determine which plan is cheaper, we need to compare the total costs of both plans over one year.

For the first plan, the sign-up fee is $50 and the monthly cost is $20. Therefore, the total cost for one year is $50 + (12 * $20) = $250.

For the second plan, the sign-up fee is $30 and the monthly cost is $25. Therefore, the total cost for one year is $30 + (12 * $25) = $330.

Comparing the total costs, we can see that the first plan is cheaper, with a total cost of $250 compared to $330 for the second plan. So Jenna should choose the first plan.