A CMBS issuance is $560,539,655 , of which the AAA-rated senior tranches total 389,575,000 of principal balance, theAAA- rated subordinate class (or A-S Class) is 28,727,000, the AA-rated tranche is $15,415,000 and the Single A-rated tranche is $30,830,000.The mountof the deal that is subordinate to (also called thesubordination level)expressed as a percent, of the of the Single A ('A') tranche is