Publishing fee usually depends on the journal publisher you have choose to submit your manuscript.
popular publisher springier charge $3000 to publish a article as they are open access. however some might charge few fee like $30-$100, or totally free of charge.
you can try to submit your paper on -JOURNAL OF THE COLLEGE OF PHYSICIANS AND SURGEONS PAKISTAN
-PAKISTAN JOURNAL OF SCIENTIFIC AND INDUSTRIAL RESEARCH SERIES A-PHYSICAL SCIENCES / B- BIOLOGICAL SCIENCE
@Asim Umer: They don't charge normally. If you want to publish your paper under 'Open Access Option', then you have to pay the fee. Mostly, researchers in western countries, they pay the fee through their project funds. But, for the researchers in third world countries, still such opportunities are not available for all.