How do you calculate your blended rates?

We used a formula of weighted averages of the summer and fall rates, including premiums. This formula is calculated by multiplying the rates for fall by 5 (the number of months in fall) and the rates for the summer by the number of days we have left in the summer.

For example, say you move into a 1 bed apartment on June 15 with a lease expiring December 31; the summer rate is $400, the fall rate is $450, and the off peak premium is $30. Your monthly rent is calculated like this (you may also type in the rates for your particular apartment):