You can use SUMIF in Google Sheets to add numbers together that are associated with a date range, specific text, or meet a numeric criterion.

Numbers is still seen as a lite version of Excel but Apple's spreadsheet is exceptionally powerful — it just keeps as much of that power hidden away as it can. AppleInsider adds up all the time ...

Numbers has the ability to open Excel files so you can work on them. You can also export spreadsheets in Numbers so that they are compatible with Excel.

Spreadsheet whiz Apple finally released Numbers, a version of its iWork suite optimized for mobile, this past week, seriously bumping up the business cred of your iPhone or iPod Touch. Numbers ...