The table below shows the energy values for the main foods used by volunteer wardens at a wild bird reserve to prepare a variety of feed mixes. [image of table] A trainee volunteer has been asked to prepare a sample of a special mix to provide exactly 5,000 calories. He has weighed out the first four ingredients but cannot read the required mass of the final ingredient because of an ink blot. This is what has been weighed out so far: mealworms 150 g, apple 150 g, raisins 250 g, suet 125 g