Is lower higher higher higher higher Better Hand Lifetime Durability if Ease of Cost Criteria Comfort (months) dropped corrections Alternatives $ Ball point pen 0.75 4.00 0.50 0.25 2.10 $ Sharpy 0.25 6.00 0.75 0.25 3.72 $ #2 Pencil 0.25 3.00 0.25 0.75 0.67 $ Plastic Mechanical Pencil 0.75 5.00 0.50 0.75 1.68 $ Metal Mechanical Pencil 0.50 8.00 0.75 0.75 3.10 Weights 0.4 0.1 0.2 0.13 0.17