Cosmetics take 1/7 = 1 unit. The remainder is 6 units; clothes are 5/6 of it = 5 units, leaving 1 unit. Clothes (5 units) exceed cosmetics (1 unit) by 4 units = $420.<br><br>[[model:questions/solutions/q4358.png]]<br><br>• Clothes − cosmetics → 5 units − 1 unit = 4 units → $420<br>• 1 unit → $420 ÷ 4 = $105<br>• Money left → 1 unit = $105<br><br>Ms Pretty had $105 left.<br>Check: total 7 × $105 = $735; cosmetics $105, clothes $525, left $105; $525 − $105 = $420. ✓