Splish Brothers 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,$$600,,$$$400,$$$200,,],[$J$.$ Montgomery,$400,100,,,300,],[$C$.$ Klein,$160,,,50,,110],[$C$.$ Sheen,$200,200,,,,],[?,300,400,250,300,110],[\%$ Uncollectible,,$1\%,5\%,10\%,25\%,50\%$