Weight in two 750g (as declared on the packaging) bags, measured: ~1500g

After baking for 30 minutes at 230C, there are

• 750g drums
• 472g flats
• 1222g total (81.% of bags)

The bones weigh

• 149g for drums (20% of drums)
• 153g for flats (32.4% of flats)
• 302g total (24.7% of baked, 20.1% of bags)

For a total of 920g of edible food (61.3% of bags)