@Sctl97 One year transfer to Berkeley Econ here, the above posters are absolutely correct that you CANNOT use summer to meet admissions requirements.
Generally though, 22 (semester?) credits isn’t usually enough for most counselors to recommend a one year track into Econ and I wouldn’t even fathom it if you don’t have a Calc I equivalent done. The successful one year Econ transfers I know had at least 30 semester equivalent units and most had even more than that.
More importantly though, Biz Econ at UCLA is terrifyingly hard and it’s usually better to spend that extra year prepping yourself by spacing out your classes and improving your economical/mathematical maturity with other applicable courses like differential equations. Too many people struggle when they get to Econ at UCLA (or all the UCs for that matter) because they underestimate the amount of math you need to understand to be successful in Econ.
If your adamant on trying as a one year transfer, I recommend considering taking those IGETC courses online with a opposite calendar system based CC instead. (e.g Semester to Quarter) The alternate calendar helps alleviate the all-too-frequent work overloads. Foothill, DeAnza and Lake Tahoe all have a wide variety of courses that can work for you if your semester based and plan ahead.