How should the earnings on the security money be calculated after the fact?
If the person receiving a security deposit fails to invest or deposit the security money in the manner required under this section or to provide the notice or pay the interest to the tenant as required under this subsection, the tenant may give written notice to that person that such security money plus an amount representing interest at the rate of seven percent per annum be applied on account of rent payment or payments due or to become due from the tenant, and thereafter the tenant shall be without obligation to make any further security deposit and the person receiving the money so deposited shall not be entitled to make further demand for a security deposit. However, in the case of a failure by the person receiving the security deposit to pay the annual interest or to provide the annual notice at the time of the annual interest payment, if the annual notice is not also serving as a notice of change of account or institution, before the tenant may apply the security deposit plus in
