The number of seconds elapsed when the time is $time (in the 60 = 100 format) would be $time{0}*60 + $time{1}.$time{2}. Since $var{n} is the (n+1)th character of $var, so if I take the first character, muliptly by 60, and then add it to a concatenation of the second on third (Whicch represent the number of seconds) I have what I need.
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