Hi there! I can definitely help you with that.

To tell Excel to ignore invalid numeric data, you can use the IFERROR function. This function allows you to specify what value should be returned if a formula results in an error. In your case, you want to return a zero if the formula results in an error.

Here are the steps to use the IFERROR function:

1. Select the cell where you want to enter the formula.
2. Type the formula you want to use, such as =SUM(A1:A10).
3. Wrap the formula in the IFERROR function, like this: =IFERROR(SUM(A1:A10),0).
4. Press Enter to complete the formula.

Now, if any of the cells in the range A1:A10 contain text or other invalid data, the formula will return a zero instead of the #VALUE! error.

I hope that helps!