Conn. Gen. Stat. § 12-326a

(b) In the absence of the filing with the Commissioner of Revenue Services of satisfactory proof of a lesser or higher cost of doing business, such cost shall be presumed to be (1) in the case of a stamping agent who is selling cigarettes to subjobbers and chain stores, (A) seven-eighths of one per cent of the basic cost of cigarettes to such stamping agent plus (B) the cost of cartage to such subjobbers and chain stores, if performed or paid for by such stamping agent, which, absent satisfactory proof to the contrary shall be presumed to be three-fourths of one per cent of the basic cost of cigarettes to such stamping agent; or (2) in the case of a stamping agent who is selling cigarettes to dealers, (A) five and three-fourths per cent of the basic cost of cigarettes to such stamping agent plus (B) the cost of cartage to such dealers, if performed or paid for by such stamping agent, which, absent satisfactory proof to the contrary shall be presumed to be three-fourths of one per cent of the basic cost of cigarettes to such stamping agent; (3) in the case of a subjobber who is selling cigarettes to dealers, (A) four and seven-eighths per cent of the basic cost of cigarettes to the stamping agent plus (B) the cost of cartage to such dealers, if performed or paid for by such subjobber, which, absent satisfactory proof to the contrary shall be presumed to be three-fourths of one per cent of the basic cost of cigarettes to the stamping agent; (4) in the case of a dealer, eight per cent of the sum of (A) the basic cost of cigarettes to the stamping agent plus (B) the cost of doing business by the stamping agent with respect to cigarettes sold to dealers; and (5) in the case of sales at retail by a stamping agent, subjobber or chain store, the cost to the stamping agent, subjobber or chain store, as the case may be, shall be the same as the cost to the dealer.