(6) GROSS PROCEEDS OF SALES. The value proceeding or accruing from the sale of tangible personal property, and including the proceeds from the sale of any property handled on consignment by the taxpayer, including merchandise of any kind and character without any deduction on account of the cost of the property sold, the cost of the materials used, labor or service cost, interest paid, any consumer excise taxes that may be included within the sales price of the property sold, or any other expenses whatsoever, and without any deductions on account of losses; provided, that cash discounts allowed and taken on sales shall not be included, and "gross proceeds of sales" shall not include the sale price of property returned by customers when the full sales price thereof is refunded either in cash or by credit. The term "gross proceeds of sale" shall also mean and include the reasonable and fair market value of any tangible personal property previously purchased at wholesale which is withdrawn or used from the business or stock and used or consumed in connection with a business, and shall also mean and include the reasonable and fair market value of any tangible personal property previously purchased at wholesale which is withdrawn from the business or stock and used or consumed by any person so withdrawing the same, except property that has been previously withdrawn from business or stock and so used or consumed with respect to which property the tax has been paid because of previous withdrawal, use, or consumption, except property that enters into and becomes an ingredient or component part of tangible personal property or products manufactured or compounded for sale and not for the personal and private use or consumption of any person so withdrawing, using, or consuming the same, and except refinery, residue, or fuel gas, whether in a liquid or gaseous state, that has been generated by, or is otherwise a by-product of, a petroleum-refining process, which gas is then utilized in the process to generate heat or is otherwise utilized in the distillation or refining of petroleum products. In the case of the retail sale of equipment, accessories, fixtures, and other similar tangible personal property used in connection with the sale of commercial mobile services as defined herein, or in connection with satellite television services, at a price below cost, "gross proceeds of sale" shall only include the stated sales price thereof and shall not include any sales commission or rebate received by the seller as a result of the sale. As used herein, the term "commercial mobile services" shall have the same meaning as that term has in 47 U.S.C. §§ 153 (n) and 332(d), as in effect from time to time.