Existing User Form & Code: Need help with corrections on saving sheets as PDFs

I need help for the macro of a button in a user form which contains 3 checkboxes.

Checkbox 1 = Sheet A
Checkbox 2 = Sheet B
Checkbox 3 = Sheet C



The code for sheet A 'Save' button, I've written so far is -

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Check the attachment for details.

Note: SavetoPDF for Sheet A : I want to skip some ranges while creating a report.

For other sheets, there's no constraint as such!

How do I achieve this?

Click 'Save' button, then save the corresponding sheets, based on the checkboxes selected in a
single PDF (sheet 1 = Page 1 of PDF, sheet 2 = Page 2 of PDF, sheet 3 = Page 3 of PDF)