(1) In addition to any and all taxes imposed by law, there is imposed, levied upon, and collected a specific tax equal to 4% retail selling price of spirits. The tax shall be collected by the commission at the time of sale by the commission. In the case of sales to licensees, the tax shall be computed on the retail selling price established by the commission without allowance of discount.

    (2) Upon collection, the commission shall deposit the entire proceeds in the state treasury, to the credit of the state school aid fund established by sections 8, 10, and 11 of article IX of the state constitution.