I want to convert it to "MONTHLY" rather than "Yearly"

All questions and answers will benefit other posters like yourself when discussed in public threads. The point of having a public forum is to share solutions to common (and sometimes uncommon) problems with all members.
Post your question in a public thread and our many contributors will come to you to assist, especially if the title is accurate (see Rule #1) and you include a sample desensitized workbook that makes it easy for others to try and help.
To attach a Workbook
(please do not post pictures or links to worksheets)

• Click Advanced (next to quick post),
• Scroll down until you see "Manage Attachments",
• Click that then select "add files" (top right corner).
• Click "Select Files" find your file, click "open" click "upload"
• Once the upload is completed the file name will appear below the input boxes in this window.
• Click "Done" at bottom right to close the Attachment Manager.
• Click "Submit Reply"

Try this one: