“Contributions paid on his own behalf” means:
(a)
All contributions paid under this part to the Unemployment Fund on behalf of an employer with respect to wages paid by him on or before the computation date for any rating period, which have been paid on or before the end of the calendar month next succeeding such computation date.
(b)
Any additional amount of contributions paid under this part to the Unemployment Fund on behalf of an employer with respect to wages paid by him on or before the computation date for any rating
period, which have been assessed pursuant to Section 1036 and have been paid before the delinquent date for the calendar quarter in which he is given notice of the assessment pursuant to Section 1036.
(c)
Any additional contributions paid pursuant to Section 976.5.