This FAQ section should address most of the questions
you have. For additional support, you may email us at firstname.lastname@example.org.
- Q: What is the minimum information I must enter to
A: You only need to enter values in the Total
and the number of people (Num. People) fields. LunchMath
defaults to a 15% tip when you start the program. LunchMath will display
the Per Person amounts rounded up to the nearest 25
cents based on these values. Entering the Subtotal
allows LunchMath to base the tip on the Subtotal which
is the accepted method of calculation.
- Q: Why does LunchMath always round
up to the nearest 25 cents?
A: The LunchMath tip calculation engine is designed
to ensure that the numbers stay positive when Round
is On. If LunchMath rounded down as well as up, then
it would be possible to get negative numbers when the tip percentage
was set to small values. This is why LunchMath rounds up.
- Q: Why is a Tip value
displayed even though I've set the tip percentage to 0?
A: If the amounts are not evenly divisible by the number
of people splitting the bill, the amount left over during splitting
will be displayed in the Tip field.
- Q: Why is the value in the Chng
A: The Chng value shows how much change
a person should get back after putting in their money. If someone puts
in less money than they owe for their portion of the bill, LunchMath
shows a minus sign (-) and turns the value red to indicate that the
person will need to borrow money. The amount shown in the Chng
field is the amount of money that person needs to borrow to pay their
portion of the bill.
- Q: Why doesn't LunchMath allow me
to enter the tax rate directly?
A: Many locales have different tax rates for food and
alcohol and the rates are rarely on the bill. If you enter a subtotal,
LunchMath will use that and the total to calculate the average tax rate.
LunchMath will use that tax rate to calculate the Pay
amount for any adjusted values.
- Q: What is the Who
A: The Who field is strictly a comment
field to help you remember which person an adjustment is for. It is
an optional field and has no effect on any calculation.
- Q: What do I do if I have a discount?
I want to make sure the server gets their tip based on the pre-discounted
A: If you enter the Subtotal before
the discount is applied and the Total after the discount
is applied, LunchMath will calculate the tip based on the Subtotal splitting
the tip across all of the people in the party. If you would like to
give the entire discount to one person, enter the Subtotal,
Total, and put the amount of the discount in the Adjust
field. The person receiving the discount should pay the amount in the
Pay field while everyone else will pay the amount in
the Rest Owes field.