N.Y.C. Admin. Code § 20-708: § 20-708 Display of total selling price by tag or sign.

All consumer commodities, sold, exposed for sale or offered for sale at retail except those items subject to section 20-708.1 of this code, shall have conspicuously displayed, at the point of exposure or offering for sale, the total selling price exclusive of tax by means of (a) a stamp, tag or label attached to the item or (b) by a sign at the point of display which indicates the item to which the price refers, provided that this information is plainly visible at the point of display for sale of the items so indicated. This section shall not apply to consumer commodities displayed in the window of the seller.