In California, a lot of things are expensive — including TV advertisements. 

But some of the marquee primary races in California have proven particularly expensive for Democrats, as they battle each other in some of the most competitive top-two contests in the state. 

Here's a breakdown of the TV ad spending in some of the big races we've been watching, courtesy of Advertising Analytics. 

CALIFORNIA GUBERNATORIAL PRIMARY

Families & Teachers for Antonio Villaraigosa (pro-Villaraigosa): $13.3m

Newsom for CA Governor: $7.1m

Citizen Support for Newsom (pro-Newsom): $3.1m

Chiang for CA Governor: $3.0m

Villaraigosa for CA Governor: $2.3m

Cox for CA Governor: $1.7m

Peace Officers Research Association of California (pro-Villaraigosa): $350k

Education Organizations for Gavin Newsom (pro-Newsom): $312k

Allen for CA Governor: $190k

Nurses Trust Newsom (pro-Newsom): $184k

Restore Our Values (pro-Cox): $52k

Eastin for CA Governor: $12k

Total GOP spending: $1.9m

Total Dem spending: $29.6m

CONGRESSIONAL DISTRICT 39

DCCC: $1.4m

Cisneros for CA CD-39: $1.3m

Thorburn for CA CD-39: $558k

Kim for CA CD-39: $220k

Khahn-Tran for CA CD-39: $90k

Patriot Majority USA (pro-Democrats): $34k

Lee for CA CD-39: $11k

Total GOP spending: $220k

Total Dem spending: $3.4m

CONGRESSIONAL DISTRICT 48

DCCC (anti-Baugh, pro-Cisneros): $1.6m

House Majority PAC (anti-Baugh): $702k

Keirstead for CA CD-48: $672k

DCCC/Rouda: $551k

American Future Fund (pro-Baugh): $373k

Baugh for CA CD-48: $266k

Rouda for CA CD-48: $239k

Patriot Majority USA (pro-Dem): $173k

Siddiqui for CA CD-48: $56k

New OC Future (anti-Rohrabacher): $45k

Onufrei for CA CD-48: $36k

Gabbard for CA CD-48: $17k

Total GOP spending: $737k

Total Dem spending: $4.0m

CONGRESSIONAL DISTRICT 49

Kerr for CA CD-49: $3.0m

Women Vote! (pro-Jacobs): $1.6m

DCCC: $1.6m (anti-Chavez): $1.6m

Jacobs for CA CD-49: $1.4m

American Future Fund (pro-Chavez, pro-Harkey): $363k

Maryott for CA CD-49: $254k

Patriot Majority USA (pro-Dem): $193k

Applegate for CD-49: $192k

Harkey for CA CD-49: $185k

Levin for CA CD-49: $55k

Gaspar for CD CD-49: $46k

Total GOP spending: $849k

Total Dem spending: $8.0m