fast food drive thru

hey y'all, so i just started my job at a fast-food chain and its my first time working ever. And i'm mainly doing cashier at drive thru but also prepping the food at the same time bc it gets so busy during peak hours. bc of this, my avg. time is about 3 min when the drive thru goal is 2 min and 30 sec. Any advice as to how to be more quick and efficient? thanks so much (๑•ㅂ•)و✧