Friendly cab(I think they have a direct line to them from the front desk, if your talking about the Fedex ramp), last year, was either $10 or $12 to get to the terminal, then "Air Bart" to the Bart station($3, I think), then BART to SFO(about $6). Been over a year since I've done it, took about 1+45 to get from the Oakland FDX ramp to SFO, good luck.