Amazon has announced a 3.5% fuel surcharge on its sellers, joining UPS, FedEx and the US Postal Service in a strategy meant to counter rising fuel costs amid the Iran war – but experts are warning it could raise prices and put some companies out of business. Starting April 17, Amazon will apply a new “fuel and logistics-related surcharge” to third-party sellers in the US and Canada that use the e-commerce giant’s fulfillment services, an attempt to offset a historic energy supply disruption