A vertical container with base area measuring 16 cm by 18 cm is being filled with identical pieces of candy, each with a volume of 50.0 mm3 and a mass of 0.0200 g. Assume that the volume of the empty spaces between the candies is negligible. If the height of the candies in the container increases at the rate of 0.23 cm/s, at what rate (kilograms per minute) does the mass of the candies in the container increase?