Cumulative benefit balance.
Cumulative benefit balance. An employer's cumulative benefit balance as of any given June 30 is determined by adding:
(1) The net amount of the benefits charged to the employer under subpart E on or after January 1, 1990, and
(2) The cumulative amount of the employer's unallocated charges on and after January 1, 1990, as computed under paragraph (r) of this section.