Here's a spreadsheet that I need to make for the sales of a sto

- Column A has all the dates of the year (January 1, January 2, January 3,
etc.) for the entire year listed one after another (so a total of 365 rows,
starting in row 1).
- Column B has the day of the week (Monday, Tuesday, Wednesday, etc.)
corresponding to the date next to it in column A.
- Column C has the sales amount (example: $125.50) corresponding to the
date/day listed in the same row of columns A and B.

Here's my question:
If I want to have the sum of all sales made ONLY on Mondays for the entire
year to appear in a cell (let's say cell F1), what would the formula have to
be?
In other words, how can I get Excel to calculate the sum of ONLY the numbers
listed in column C which have the word 'Monday' written in the same row of
column B?

I hope I explained that clearly! Thanks in advance!