(a) Every dealer making sales within or outside the state of tangible personal property for distribution, storage, use, or other consumption in this state shall collect the tax imposed by this article from the purchaser at the time of sale.(b) On all tangible personal property imported or caused to be imported by any dealer from another state or foreign country and used by him, the dealer shall pay the tax imposed by this article as if the property had been sold at retail for use or consumption in this state. For the purposes of this article, the use, consumption, distribution, or storage for use or consumption in this state of tangible personal property shall each be equivalent to a sale at retail and the tax shall be immediately levied and collected on each such sale in the manner provided in this article. There shall be no duplication of the tax in any event as a result of this subsection.