Sage Hill Inc. determines that at the end of December, they have the following aging schedule of Accounts Receivable:

$\backslash$table$[[$Customer$,$Total,Number of Days Past Due$],[$Not yet due,$1-30,31-60,61-90,$Over $90],[$K$.$ Perry,$$700,,$$$300,$$$400=,,],[$J$.$ Montgomery,$300,200,,,100,],[$C$.$ Klein,$200,,,50,,150],[$C$.$ Sheen,$400,400,,,,],[?,600,300,450,100,150],[\%$ Uncollectible,,$1\%,5\%,10\%,25\%,50\%$