Sociology and econ have some themes overlapping i think it might be better to do econ- i suggest looking at some exam papers for both alevels and example essays
as someone that done econ and BS, i enjoyed econ more as i think it easier to understand and get marks in and eventually pass however this could just be me,
business has way more stuff to memories and learn even tho it easy on paper, the examrs are not that easy
however its up to you most of econ and bs content overlaps so for me it was easy to manage both, id say go with maths, bs and econ (however if you really want sociology then id say pick econ since it "allgedly overlaps" with econ as the person above mentioned )