Naomi got an email inviting her to join the fan club for her favorite singer the fan club cost $7.50 a week she decided not to join how much did she save after a year

To calculate how much Naomi saved after a year, we need to find out how many weeks there are in a year and then multiply it by the cost of the fan club membership per week.

There are 52 weeks in a year (assuming it is not a leap year).

So, Naomi would have saved $7.50 x 52 = $<<7.5*52=390>>390 in a year by not joining the fan club.