Table:
text: United States Senate election in California, 2010
General election
Polling
Poll_source Dates_administered Sample_size Margin_of_error Barbara_Boxer_D Carly_Fiorina_R Other Undecided
Los Angeles Times (report) May 19–26, 2010 — — 44% 38% — —
Research 2000 (report) May 17–19, 2010 600 ± 4.0% 48% 39% — —
PPIC (report) May 9–16, 2010 2003 ± 2.0% 48% 39% — 13%
Rasmussen Reports (report) May 12, 2010 500 ± 4.5% 45% 38% 4% 12%
Rasmussen Reports (report) April 12, 2010 500 ± 4.5% 42% 38% 7% 13%
PPIC (report) March 24, 2010 2002 ± 2.0% 44% 43% — 13%
The Field Poll (report) March 18, 2010 748 ± 3.7% 45% 44% — 11%
Rasmussen Reports (report) March 11, 2010 500 ± 4.5% 46% 40% 4% 10%

Question: What is the sample size of the US Senate election in the 2010 California general election if the administered date is March 24, 2010?