(3) An amount, which shall be transferred by the uniform system, equal to the lesser of the employer's contributions to the uniform system or the amount that would have been contributed by the employer for the service had the member been a member of the state teachers retirement system at the time the credit was earned, with interest on that amount from the last day of the year for which the service credit was earned or in which payment was made for military service to the date of the transfer. On receipt of payment from the member, the state teachers retirement system shall notify the uniform system, which, on receipt of the notice, shall make the transfer required by this division. Interest shall be determined as provided in division (F) of this section.
A member may choose to purchase only part of the credit the member is eligible to purchase under this division in any one payment, subject to rules of the state teachers retirement board.