Buttons to show and hide fields that hide button after OnClick

I have two div fields that are worksheets and contain many fields to generate a price quote. The two fields must remain visible when the form loads; call them fieldname1, fieldname2

I want to create two buttons

Button 1, called Presentation that will:

1. Hide fieldname1 and fieldname2
2. Perform a calculation from an auxiliary field (fieldname5)
3. Show fieldname3
4. Hide the Presentation button when fieldname3 is opened

Another button in the fieldname3 div (call it Worksheet) will do the following:

1. Show fieldname1, fieldname2
2. Hide fieldname3
3. Hide Presentation Button

I did not see this topic in the forum, I apologize if I missed it.

Thanks!