this shit is it

econ/exchange.py

@@ -127,10 +127,11 @@ class Exchange():
         # calculate price for complete order fullfilment
         prev=amount
         amount=int(amount)
+        price=round(price)
         if amount<1:
             # invalid order
             return None
-        full_price=round(price*amount,2)
+        full_price=round(price*amount)
 
 
         # Move resources into escrow
@@ -294,11 +295,11 @@ class Exchange():
             #data["step"]=step
             data["tstep"]=timepoint
             data["instrm"]=instrm
-            data["best_ask"]=0
-            data["best_bid"]=0
-            data["total_demand"]=0
-            data["total_supply"]=0
-            data["market_rate"]=0
+            data["best_ask"]=None
+            data["best_bid"]=None
+            data["total_demand"]=None
+            data["total_supply"]=None
+            data["market_rate"]=None
             localStepDB[instrm]=data
     
         ## add best ask/best bid