COST price of A = 125% of the Cost price of BArticle B is SOLD at 10% loss = Rs. 1400Formula used:Selling price = Cost price ± Profit/LossCalculation:Let the Cost price of A be Rs. a and the Cost price of B be Rs. bAccording to the questionThe selling price of B = 0.9b0.9b = 1440⇒ b = 1440 × (1/0.9)⇒ b = Rs. 1600According to the questiona = 125% of b⇒ a = (124\100) × 1600⇒ a = Rs. 2000Total cost price= 1600 + 2000 = Rs. 3600Over all profit is 20%= 3600 × (120/100) = Rs. 4320So, article A should be sold at4320 - 1440 = Rs. 2880.∴ A should be sold at Rs. 2000