In short... the answer is yes you may combine self-employed income under category F with salaried and/or non-salaried employment under category A
You must be sure to carefully understand and comply with
all requirements for each category and you must evidence that both are ongoing at the date of application.
Many folks have followed this route in meeting the income requirements.
Yes Sherie, you'll need to complete both sections that you're relying on to meet the needed financial requirement.
Hope this helps