Question

a shopkeeper purchased 15 dozen pens for rs 60 per dozen.he sold them
at rs 6.50 each.find his gain or loss?

Answer 1

one dozen= 12 pens 15 dozens= 12×15=180 then one dozen of pens= rs 60 each pen= 60÷12=rs 5 as he sell each pen at rs 6.50 and when he bought each pen cost was rs 5. so his profit happened at sell price-cost price =rs 6.50-5 =rs 1.50