Table:
text: United States Senate special election in California, 1992
General election
By county
County Feinstein Votes_2 Seymour Votes_4 Horne Votes_6 Meeu_ Votes_8 Boddie Votes_10 W_I V_s_
San Francisco 80.60% 250972 15.79% 49165 1.63% 5062 0.62% 1919 1.36% 4233 0.00% 10
Alameda 72.56% 374675 21.93% 113223 2.30% 11866 1.61% 8323 1.60% 8257 0.00% 23
Marin 71.26% 92205 24.61% 31846 1.45% 1880 0.88% 1142 1.80% 2328 0.00% 0
Santa Cruz 67.88% 76327 25.40% 28562 2.49% 2801 1.84% 2072 2.39% 2686 0.00% 1
San Mateo 67.25% 181990 27.89% 75470 1.84% 4983 1.29% 3478 1.73% 4684 0.00% 0
Contra Costa 62.96% 229988 31.62% 115507 1.92% 7011 1.77% 6470 1.73% 6320 0.00% 2
Sonoma 62.84% 121471 29.38% 56793 3.02% 5846 2.43% 4702 2.33% 4502 0.00% 0

Question: What is the difference between Horne's votes in Marin and his votes in Santa Cruz in the United States Senate special election in California, 1992?

Question: How many votes did Horne have in Contra Costa in the 1992 US Senate special election in California?