hi, im having a bit of trouble understanding how to formulate rhis problem, can someone please help me? the problem is: there are two types of product A and B. In a monthly prod. the shop makes 16 of A when it makes a profit of £1000 per model, and this drops to 12 when the profit is increased £1200. Also they sell 20 of B, when their profit is £1400 per model, and when they increase the profit to £2100 they sell only 10. how do i formulate this problem?