False Advertising

Pick & Pay in Fichardtpark has advertised Sta-Soft refill packs on their shelves:<br> Buy 3 get one free. The pack cost R69.99 and has 4 2L refills in it. If u divide the amount by 4 = R17.50 each.<br> <br> On the other hand, a single 2L refill packet is advertised as R16.90. If u multiply 16.90 by 4 = R67.60. <br> <br> Now if u buy the advertised pack at R69.99, where is the free refill that's for free? Secondly why is each refill in the pack costing R17.50 unlike the lose ones at 16.90? <br> <br> THIS IS FALSE ADVERTI*****T!!! Someone needs to go back to school to finish his arithmetic lessons.