QB Issue Resolution:

yes, in the block, enter the numbers just as you have shown, and use the tab key to finish the equation and move to the next field, tab only works, not enter

Resolution for Issue 'I want to add numbers in one cell (JE’s in QB’s online) . For example, Office Exp is $4+$3+$2.50. I should be able to add, calculating a sum, instead of listing each.' available: Yes (Solved).
Source: Intuit Community forum.

I want to add numbers in one cell (JE’s in QB’s online) . For example, Office Exp is $4+$3+$2.50. I should be able to add, calculating a sum, instead of listing each.: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

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