The tax authorized by this chapter shall be collected from the purchaser by the person maintaining a place of business in this state who delivers the electricity to the purchaser. This tax shall constitute a debt of the purchaser to the person who delivers the electricity to the purchaser and if unpaid, is recoverable in the same manner as the original charge for delivering the electricity. Any tax required to be collected pursuant to this chapter and any such tax collected by a person delivering electricity shall constitute a debt owed to the municipality by such person delivering the electricity. Persons delivering electricity shall collect the tax from the purchaser by adding such tax to the gross charge for delivering the electricity. Persons delivering electricity shall also be authorized to add to such gross charge an amount equal to three percent of the tax to reimburse the person delivering electricity for the expense incurred in keeping records, billing customers, preparing and filing returns, remitting the tax and supplying data to the municipality upon request. If the person delivering electricity fails to collect the tax from the purchaser, then the purchaser shall be required to pay the tax directly to the city in the manner prescribed by the city. Persons delivering electricity who file returns pursuant to this section shall, at the time of filing such return, pay the city the amount of the tax collected pursuant to this chapter. (Ord. 1679 § 1 (part), 1998)