Answer:
Plan 1 and she would save $120
Explanation:
Plan 1 costs $34.99 per month.
For 12 months, it would cost 12 * $34.99 = $419.88
Plan 2 cost $134.97 for 3 months.
A year is 12 months, so it has 4 periods of 3 months.
In one year, this plan would cost 4 * $134.97 = $539.88
She should choose Plan 1.
She will save $539.88 - $419.88 = $120