The easiest way to do this is with a spreadsheet program like Excel or OpenOffice Calc. You can put in times and have the program calculate the difference between them.
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1. Visit the U.S. Department of Labor website to learn federal requirements for maintaining accurate records of time worked. Learn laws that are relevant to time cards and consequences
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You will need to add up how many hours the person worked. Once you have the total hours times it by the amount of money the person makes an hour.
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1. Divide your annual percentage rate (APR) by 365 to find the daily interest rate. For example, if your annual rate equals 16.75 percent, you would divide 0.1675 by 365 to get 0.0004589
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