CBSE Class 8 Maths Profit and Loss

pls answer the 3rd one

A shopkeeper sold article at a gain of 5% if he had sold it for 16.50% less he would have lost 5% find the cost price of the article
 10 television sets we are sold by Harish at 5 of them he gains 10% and another 5 hi losses 10% find his gear or losses present in whole transactions

Math
 Rachna bought 45 one kg bags of almonds at Rs.900 each .She sold 30 of them at Rs.1000 each and the Remaining at Rs.800 each. Find her gain or loss percent?
 Mahesh sold a watch at 10% loss .Had he sold it for rupees 104 more he would have gained 8%.find the selling price of the watch
 the MP of 5 kg rice is rupees 120. A spoon worth rupees 10 is given with every pack of 5 kg rice e.then the retiral gains 10% .find the CP of 5 kg rice
 a milkman sold two of his buffaloes for rippers 20000each. On one he made a gain of 5 percent and on other a loss of 10 percent. Find his overall gain or loss
 The cost price of an article is rs 500.The shopkeeper sells it at a gain of 25/2 percent .ST of 15 percent also charged. Find the amount payable by the customer
 c.p =₹80 and s.p =₹76.80 find the loss percent