You haven't give complete information but my best guess is
However, I also think that there is a better way to do this involving OFFSET or INDEX but I can't tell you what it is unless you tell me how you are calculating the cell reference (i.e., what is the formula in J7). This doesn't give any insight as to the logic you are using to determine what cell to use based on the month: "So in reference to February's data (when February is the last month) the cell I want to reference is C44, in March it will be C47, in February during a leap year it will be C45...etc..."
The best option, of course, is to attach your file. To attach a file:
- Under the text box where you type your reply click the Go Advanced button.
- In the next screen look above the reply box and click the "paper clip" icon. You will get a pop-up screen.
- In the pop-up, click Add then Select to select a file from your local drive
- Click the Upload button to upload the file
- Click Done to attach it.
It will be displayed as an attachment underneath your post text. Alternatively as the last step you can click the Insert Inline button and a hyperlink to the file will be inserted directly into your post text in the spot where your cursor is set at the moment you click the button.
Here are step-by-step instructions with screen shots
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