I have a data sheet, "Sheet1"

A B C D E F G
mon Tue Wed Thu Fri Sat Sun
3 5 6 5 8 10 12

The numbers in row 2 are averages. They are different for each day of the
week. They change daily based on data input by the user.

I have a User Form. It has the following controls:

1. A combo box, with the 7 days of the week; Monday through Sunday. The
user selects one of the 7 days.
2. A "buffer" text box. I have it set to initialize with the value 0.10
3. An "Order" text box. I would like it to initially populate with the
appropriate value (based on the selected day of the week) that is contained
in Sheet1, row 2, increased by the number in the "buffer" box, rounded up to
the nearest whole number.

For example, if the user selects "Wednesday" from the Combo box, I would
like the "Order" box to initialize with the value 7. [6+(0.10*6)]. The
value must always round up. If the user selected Sunday, then the "Order"
box should populate with the value 14 -- [12+(0.10*12), rounded up]

How do I do this?

Also, if the user changed the 'buffer' number, how would I get the order to
recalculate?

Please advise if clarification is needed. Otherwise thank you.