More typos - and that's after what I thought was proof reading - jeesh

README.md

@@ -99,7 +99,7 @@ The system ID shown is the key name you should use for your system. The second v
 
 ![Console Output for Above Commands](./design/finding-quantity.png)
 
-In the item, expand the "system" property, and look for a sub-property whose name has something to do with quantity. If it has the same value you supplied, that clinches it. That's your quantity field. This is usually a simple value like "quantity", "count", or "amount", but it may be nested in a structue, like Star Wars FFG's "quantity.value". That's the value to use for your system's "quantity" property in the JSON.
+In the item, expand the "system" property, and look for a sub-property whose name has something to do with quantity. If it has the same value you supplied, that clinches it. That's your quantity field. This is usually a simple property name like "quantity", "count", or "amount", but it may be nested in a structure, like Star Wars FFG's "quantity.value". That's the value to use for your system's "quantity" property in the JSON.
 
 ### Defining new topologies - something you almost never need to do