readme upadate

Author: thdaraujo

README.md

@@ -53,6 +53,10 @@ In Patch, orders represent a purchase of carbon offsets or negative emissions by
 mass = 1_000_000 # Pass in the mass in grams (i.e. 1 metric tonne)
 Patch::Order.create_order(mass_g: mass)
 
+# Create an order with maximum total price
+total_price_cents_usd = 5_00 # Pass in the total price in cents (i.e. 5 dollars)
+Patch::Order.create_order(total_price_cents_usd: total_price_cents_usd)
+
 ## You can also specify a project-id field (optional) to be used instead of the preferred one
 project_id = 'pro_test_1234' # Pass in the project's ID
 Patch::Order.create_order(mass_g: mass, project_id: project_id)