I've attached shots of your Designer for your screens.
It's all dithering for nothing,
where what you need is a single screen table of expenses
and sales, along with a table of expense and sales types
to drive selections.
Is this a single person app that can live in one phone,
or is for a business, with multiple people having access to
You keep track of dates and expense types.
Do you also need to filter the data by anything else,
like by order number or sales person?
Will this app have Internet access?
Do you have a sample spreadsheet set up with data
for this app?
Can you set it up as a shared Google Sheet?