Making Ironwood plank (Plank Make + Sawmill voucher)

Making Ironwood plank (Plank Make + Sawmill voucher) in OSRS: 1 × Ironwood logs, 1 × Nature rune, 2 × Astral rune, 15 × Earth rune, 1 × Sawmill voucher + 3,500 coins → 2 × Ironwood plank. Profit right now: +533 gp after GE tax (input cost 6,727 gp).