Page 50: Formulas Contributions For registered body corporates CONTRIBUTIONS = PROVISIONS ( excl  GST) - INTEREST + TAX + FEES ( excl GST) +- ADJUSTMENT For non-registered body corporates CONTRIBUTIONS = PROVISIONS ( incl  GST) - INTEREST + TAX + FEES ( incl GST) +- ADJUSTMENT Closing balance For registered body corporates CLOSING BALANCE = OPENING BALANCE - OUTGOINGS ( excl GST) + INTEREST - TAX - FEES ( excl GST) + CONTRIBUTIONS ( excl GST) NOTE: adjustments are included in the 'contribution' For non-registered body corporates CLOSING BALANCE = OPENING BALANCE - OUTGOINGS ( incl GST) + INTEREST - TAX - FEES ( incl GST) + CONTRIBUTIONS NOTE: GST is included on Outgoings and Fees, because the GST represents an expense to the body corporate that affects the fund balance. Contributions is not expressed in terms of GST because it is not relevant to non-registered body corporates. Adjustments are included in the 'contribution'. Interest on funds For registered body corporates INTEREST = (OPENING BALANCE + (OPENING BALANCE - OUTGOINGS ( excl GST) - FEES ( excl GST) + PROVISIONS ( excl GST) +- ADJUSTMENTS)) / 2 * INTEREST RATE For non-registered body corporates INTEREST = (OPENING BALANCE + (OPENING BALANCE - OUTGOINGS ( incl GST) - FEES ( incl  GST) + PROVISIONS ( incl GST) +- ADJUSTMENTS)) / 2 * INTEREST RATE