The term tips received, as used in section 146-1.3 of this Part, and the term receives tips, as used in sections 146-3.3 and 146-3.4 of this Part, shall mean the hourly rate that results when the total amount of tips received by a tipped employee during a week of work are divided by the total working time of such worker during that week of work. The total amount of tips received shall be the net amount of tips received after adjustments for tip pooling, tip sharing, and credit card charges pursuant to sections 146-2.14, 146-2.15, 146-2.16 and 146-2.20 of this Part.