Based on the image and the surrounding text, here are the fields and what they are used for:

• Start Time: The time an employee (or you) began working (clock-in).
• End Time: The time an employee (or you) finished working (clock-out).
• Break Time (minutes): The total duration of unpaid breaks taken during the shift, entered in minutes.
• Hourly Rate ($): The amount of money earned per hour of work.

The Calculate button would process this information to determine the total hours worked, often in decimal format, and the gross pay for that single shift.

The accompanying text highlights that a Time Card Calculator is a digital tool designed to:

• Track Work Hours: Record clock-in, clock-out, and breaks.
• Reduce Errors: Automatically convert hours and minutes to accurate totals (often decimals).
• Ensure Compliance: Help with tracking overtime and breaks according to labor laws.
• Handle Payroll: Calculate weekly, biweekly, or monthly payroll easily.