The sale price of an article, including the sales tax is Tk. 616. The rate of sales tax is 10%. If the shopkeeper has made a profit of 12% then the cost price of the article is:
ক
Tk. 500
খ
Tk. 515
গ
Tk. 550
ঘ
Tk. 600
সঠিক উত্তর: Tk. 500