A kitchen uses half a kilogram of meat to make a meat pie. It has been estimated that 800 pies will be made in July and 900 pies will be made in August. The chef likes to hold the kitchen's meat inventory at 10% of the following month's needs. If the 30 June inventory of meat is 40 kilograms, how many kilograms of meat should be purchased during July? A. B. C. D. 425 kg E. 400 kg 405 kg 410 kg 450 kg