Are you at a quarter system CC, like De Anza, Foothill, or Lake Tahoe? If so, remember that 1 quarter unit = 2/3 semester unit, and the minimum number of units for junior transfers is 60 semester units = 90 quarter units.
For UC purposes, your AP scores are worth 40 quarter units = 26.6 semester units, according to http://admission.universityofcalifornia.edu/counselors/exam-credit/ap-credits/index.html .