diff --git a/eveal/main.py b/eveal/main.py
index 1176a2b..b9adc38 100644
--- a/eveal/main.py
+++ b/eveal/main.py
@@ -29,8 +29,8 @@ async def reprocess(ep_items: Evepraisal, ep_mat: Evepraisal, efficiency: float
         item = db.get(models_sde.SDEType, rawitem.typeID)
         buy_reprocess = sell_reprocess = 0.0
         for mat in item.materials.all():
-            buy_reprocess += matprices[mat.material_type_id]['buy'] * mat.quantity * efficiency
-            sell_reprocess += matprices[mat.material_type_id]['sell'] * mat.quantity * efficiency
+            buy_reprocess += matprices[mat.material_type_id]['buy'] * mat.quantity/mat.type.portionSize * efficiency
+            sell_reprocess += matprices[mat.material_type_id]['sell'] * mat.quantity/mat.type.portionSize * efficiency
         item_reprocess.append(PriceReprocess(typeID=rawitem.typeID,
                                              buy=rawitem.prices.buy.max,
                                              sell=rawitem.prices.sell.min,