Suppose contact lenses cost $300 for a year supply or $30 for a month's supply which is less expensive to order per year paying for 12 months at one time or paying for one month at a time

Answer 1

To determine which option is less expensive, we need to calculate the total cost for each scenario.

1. Ordering per year:
The cost for a year supply of contact lenses is $300.
Total cost for the year: $300

2. Ordering per month:
The cost for a month supply of contact lenses is $30.
Total cost for one year (12 months): $30 x 12 = $360

Comparing the two options:
- Ordering per year: $300
- Ordering per month: $360

Therefore, ordering per year is less expensive, as it costs $300 compared to the $360 cost for ordering per month.