updateProductInventory.md

+### Running
+``` ruby
+ThreeDeeCart::Customer.update_inventory(options)
+```
+
+### Available Options
+Bold parameters are required:
+
+
+**storeURL** - 
+3dCart Store URL from which the information will be requested. i.e.: www.3dcart.com
+
+**productId** -
+String Search for specific product id.
+
+**quantity** - 
+Number Stock quantity for the specified product. 
+
+**replaceStock** -
+Boolean Indicates if the stock should be replaced or incremented by the new quantity. 
+
+### Example
+``` ruby
+ThreeDeeCart::Customer.update_inventory({storeURL: "http://www.3dcart.com", productId: "a12345", quantity: 10, replaceStock: false})
+```
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