[22] The sentencing judge's discounting of the notional aggregate sentence for this reason was substantial. The notional aggregate imprisonment was effectively reduced by some twelve months, if one offsets the nearly six months pre-sentence custody against the 18 month activated term. There was some debate during the hearing in this Court about that approach, but I have concluded that the Court should not find any error in it. It was not submitted for the respondent that the sentencing judge erred in applying the "totality principle", or in the manner and extent to which her Honour applied it, and the relevant authorities were not cited in this application. Rather, the burden of the respondent's submission was that a five year term for the home invasion offences was within the sentencing discretion. Further, as is the case in many aspects of sentencing, the application of the totality principle involves a discretionary judgment committed to the sentencing judge. In that respect, the sentencing judge had the advantage, denied to this Court, of seeing and hearing the applicant during a lengthy trial and in the sentence hearing. The sentencing judge's view that some substantial allowance should be made in the application of the totality principle should be respected.