Colorado. Taxation. Sales tax Governor authorized study of tax on drugs and food. Post July 16, 1962 p.1 Merchandise tax brings annual revenue of $13.5 million to state. Post Nov. 15, 1962 p.3 Legislature approves income & cigarette tax increase. IMN Mar. 2, 1964 p.5 Colorado municipal league favors constitutional amendment authorizing statewide sales tax for local purposes. Post Apr. 19, 1964 p.3A $35.2 million sales tax bill pushed through senate. Post April 26, 1965 p.3 0