Consumers gassing up in Winter Haven and Lakeland on Monday agreed on one thing: They're perplexed. “I don't understand how it goes down one or two pennies a week, but when it goes up, it's 20 cents,” said Montie Noble, 68, of Alturas, who was filling the tank for $2.18 a gallon at the Murphy Express station at 801 Third St. SW in Winter Haven. “There should be a regulation it goes up as slow as it goes down. It's got us trapped.”