The official booklet (IBO Document 2024/2025) gives you the raw data:
the fraction with numerator % cap delta cap Q sub d cap A end-sub and denominator % cap delta cap P sub cap B end-fraction Costs & Revenue Total Revenue (TR) Marginal Cost (MC) ib economics hl formula booklet repack
Next to the CS formula, draw a tiny right-angled triangle. Visual learners recall shapes faster than text. The official booklet (IBO Document 2024/2025) gives you