California’s $20 minimum wage led to fast-food price hikes, lower customer traffic, study shows Fox BusinessIn-N-Out confirms price changes on Double-Double and other menu items ABC NewsIn-N-Out raises California prices of Double-Double after minimum wage law USA TODAYCalifornia’s $20 fast food wage is hurting business, data shows Business InsiderIn-N-Out exec blames California for menu price hikes SFGATE