Except as otherwise provided in subsection (c), the fee for filing and indexing a record under this part, other than an initial financing statement of the kind described in § 9-502(c), is: $25 if the record is communicated in writing and consists of eight or fewer pages; $75 if the record is communicated in writing and consists of more than eight pages; and $25 if the record is communicated by another medium authorized by filing-office rule. The number of names required to be indexed does not affect the amount of the fee in subsection (a). This section does not require a fee with respect to a record of a mortgage which is effective as a financing statement filed as a fixture filing or as a financing statement covering as-extracted collateral or timber to be cut under § 9-502(c). However, the recording and satisfaction fees that otherwise would be applicable to the record of the mortgage apply.