The following is an aging schedule for a company's accounts receivable as at December $31,2019$:

$\backslash$table$[[$Customer$\text{'}$s name,$\backslash$table$[[$Total amount$],[$owed$]],\backslash$table$[[$Current $($not$],[$yet due$)]],$Number of days past due$],[1-30,31-60,61-90,$Over $90],[$Aber$,$$$40,000,,$$$9,000,$$$31,000,,],[$Bohr$,40,000,$$$40,000,,,,],[$Chow$,42,000,15,000,12,000,,$$$15,000,],[$Datz$,20,000,,,,,$$$20,000$