biblatex.cfg

\ProvidesFile{biblatex.cfg}

% Put your definitions here.
\renewcommand*{\newunitpunct}{\addcomma\space}

% Remove 'in:'
\renewbibmacro{in:}{}

% Add comma after Journal name
\renewbibmacro*{journal+issuetitle}{%
  \usebibmacro{journal}%
  \setunit*{\addspace}%
  \iffieldundef{series}
    {}
    {\newunit
     \printfield{series}%
     \setunit{\addspace}}%
  \usebibmacro{issue+date}%
  \setunit{\addcolon\space}%
  \usebibmacro{issue}%
  \setunit{\addcomma\space}%
  \usebibmacro{volume+number+eid}%
  \newunit}

% For Journals, use volume(number)
\renewbibmacro*{volume+number+eid}{%
  \printfield{volume}%
%  \setunit*{\adddot}% DELETED
  \setunit*{\addnbspace}% NEW (optional); there's also \addnbthinspace
  \printfield{number}%
  \setunit{\addcomma\space}%
  \printfield{eid}}
\DeclareFieldFormat[article]{number}{\mkbibparens{#1}}
\endinput