A square is always 100 square feet. Total squares applies to Per square pricing mode.

Total squares are calculated like this:
Roof Area squares + Ridge squares + Starter squares = Total Squares

Ridge squares are calculated like this:
Each bundle of ridge is .33.33 square feet or 1/3 of a square. (The 3 you entered above)

Starter squares use the same calculation. (The 3 you entered above)

Example:
Using the above Bid Information
Ridge covers 32-ft per bundle and we have 32-ft ridge = 1-bundle or 1/3 square.
Starter covers 36-ft per roll and we have 36-ft = 1 bundle or 1/3 square.

If we have 25 squares of shingles are total would be:
25 + .33 +.33 = 25.66 squares

Note:
To not have starter and or ridge added to your total squares leave the bid information field(s) blank.
We realize that many bundles or boxes of ridge or starter cover different amounts. Enter the number and description of what you use in the Job Cost Grid.