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If you forgot your work or school password, never got a password from your organization, or have been locked out of your account, you can use your security info and your mobile device to reset your work or school password. Your administrator must turn on this feature for you to be able to register your information and reset your own password.

SUMIF (range, criteria, [sum_range]) The SUMIF function syntax has the following arguments: range Required. The range of cells that you want evaluated by criteria. Cells in each range must be numbers or names, arrays, or references that contain numbers. Blank and text values are ignored.

How to use the SUMPRODUCT function in Excel, one of Excel’s math and trig functions, using multiplication, addition, subtraction, and/or division to return the sum of the products of corresponding ranges or arrays.

如何在 Excel 中使用 SUMIFS 函数（Excel 的数学和三角函数之一）来添加满足多个条件的参数。.