Added some details from the manual

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+We have version 5 of the vend software in the machine.
+
+Manual says for version 4 the following information is stored by
+the controller (presumably in the NVRAM):
+
+       Machine Serial Number
+               Blank to 9999999
+               
+       Machine ID Number
+               Blank to 9999999
+       
+       Audit Number - # of times MIS has been performed
+
+       SALES (resettable) 0 - 1,999,999.95
+       SALES (unresettable) 0 - 1,999,999.95
+       
+       BAGTOTAL (cash box + bill) 0 - 1,999,999.95
+       cash box 0 - 1,999,999.95
+       card sales 0 - 1,999,999.95
+
+       bills in stacker
+        bill total 0 - 1,999,999.00
+
+        ones 0 - 65535
+        twos 0 - 131070
+        fives 0 - 327675
+        tens 0 - 655350
+        twenties 0 - 999980
+
+        coins in tubes
+
+        tube total  0 - 357
+
+        $1 0 - 255
+        .25 0 - 63.75
+        .10 0 - 25.50
+        .5 0 - 12.75
+
+       win snack vends
+         0 - 999,999.95
+
+       shopper vends
+         0 - 999,999.95
+
+       promo vends
+         0 - 999,999.95
+
+       # VENDS PER PRODUCT