If a stationery store owner buys 50% more identically-priced calendars than she usually purchases, she will be given a 20% discount off the standard price. Her total cost would then be 120 times the dollar value of the standard price of one calendar. How many calendars does she usually purchase? Answers.
A) 40 B) 80 C) 100 D) 120 E) 140
Let the Price is x per item   and the final number of items she bought is y items   So to buy y items , the cost will be .8x (80% of original price , since there is a 20% discount on it)   120*x = y*0.8*x   Solving we get y =150   now to get the discount she bought 50% more than what she usually buys   So the number of items she usually buys is 50% less than 150   i.e. original number of items she usually buys is = 150*(100/150)= 
<gadget id="calculator">150*(100/150)</gadget>
<output>100</output>
100   Hence Answer is (100)
<result>C</result>
If a stationery store owner buys 50% more identically-priced calendars than she usually purchases, she will be given a 20% discount off the standard price. Her total cost would then be 120 times the dollar value of the standard price of one calendar. How many calendars does she usually purchase?