Please show solution and explain.

14. Mineral water contains 2.5kg. of magnesium per tonne. By using processing method of A,82% of the metal can be recovered at a cost of P4 per tonne of water pump and processed. If method B is used, 68% of the available metalis recovered at a cost of only P2.80 per tonne of water pumped and processed. The two processes are substantially equal as to investment and time requirements. (Note: 1 tonne =1 metric ton =1000kgs) - If the extracted metal can be sold for P2.50 per kg., which processing method should be used? - How much profit will be achieved in Method A? - How much profit will be achieved in Method B? - At what selling price for the metal would the two processes be equally economical