The 100% eCommerce business I work for has integrated Shipstation to handle all shipping. When U.S. customers go to check out, they see USPS and UPS variant options with predicted rates for each option and its variant. Is there a way to limit customers' option to only UPS (essentially excluding all USPS because I have to drop those off and UPS picks up) if their order is above a certain threshold (i.e. $40)? I've chatted a bit with both Shipstation and Shopify Help but each says it's up to the other app to make it happen. Thanks!