Answers

2015-06-06T15:17:49+05:30
Loss for pens= 20* (-2)
                    = -40 
profit for pencils = 10*1
                             =10

Total earning = Rs. 10 -40 
                    = Rs. -30
 therefore it was a loss.

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2015-06-06T15:33:03+05:30
Pen = 20 * (-2) = -40
Pencil = 10 * 1 = 10
Total earning = -40 + 10 = -30 
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