Suppose the market for cigarettes is characterized by the following information :
Qd= 70-5P (demand)
Qs = 3P-10 (Supply)
Suppose the government impose a sales tax of $2 per unit. Calculate the Dead-Weight-Loss due to the sales tax.
(Note : P= Price per unit; Qd= thousands of units demanded; Qs = thousands of units Supplied)