If you would like to determine your shipping rates based on order amounts, this can be done by using flat rate shipping and Price Range Adjustments.
Configure your flat-rate shipping fees
In this scenario, we'll set up flat-rate shipping on our products with a price of $0.00 and let the shipping fee be calculated by the Price Range Adjustments.
Configure your price range adjustments
From the Settings>Shipping Settings>Price Range Adjustments area of your store admin, enter your price range adjustments. Use the "Additional Price" to add the adjustment to the flat-rate price of the order.
Above is a screenshot of the shipping option provided for an order with the total of $25.00