How to Build a Ap Lang Calculator

function predictAPLangScore(mcCorrect, essayScores) {
  const mcScore = Math.min(mcCorrect, 45);
  const frRaw = essayScores.reduce((sum, s) => sum + Math.min(s, 6), 0);
  const frScore = frRaw * 3.0556; // scale 18 raw to ~55 max
  const composite = Math.round(mcScore + frScore);

  const cuts = { 5: 73, 4: 60, 3: 45, 2: 31 };
  let apScore = 1;
  for (const [score, min] of Object.entries(cuts).sort((a, b) => b[1] - a[1])) {
    if (composite >= min) { apScore = parseInt(score); break; }
  }

  return {
    composite, maxComposite: 100,
    breakdown: { mc: mcScore, fr: Math.round(frScore * 10) / 10 },
    apScore,
    essays: { synthesis: essayScores[0], rhetorical: essayScores[1], argument: essayScores[2] }
  };
  }