Time Computation Error

im trying to subtract Time IN (column C) and Time OUT (column F) but i failed as seen on thie screenshot below, this time data's are exported from our companies program system and its in csv filetype so at first i thought i could just save it as .xls but that did not help either, i also tried changing the formats of the columns by right clicking and going to format cells > number > custom > hh:mm:ss AM/PM but no luck still, i uploaded the entire csv file under Attachments too

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any help about this is greatly appreciated