Suppose contact lenses cost $300 for a year’s 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 1 month at a time

Question

__ month(s) at a time

Answer 1

To find out which option is less expensive, we need to compare the total cost for ordering contact lenses for a year.

If we pay for 12 months at one time, the cost would be $300.

If we pay for 1 month at a time, the cost for each month would be $30. Therefore, the cost for 12 months would be $30 * 12 = $<<30*12=360>>360.

So, ordering contact lenses per year by paying for 1 month at a time is less expensive.