Consider the question. Alfred is storing a tonne of maize each month for the next 2 years. If 5 tonnes are stolen and 8 tonnes are given to him as a donation, how many tonnes of maize does he have at the end of the 2 years.
 What is the step-by-step reasoning process to arrive at the answer: 27?
Before his maize is stolen, the maize he stores at the end of 1 year is 12 * 1 = 12 tonnes of maize. Before his maize is stolen, the maize he stores at the end of 2 years is 12 * 2 = 24 tonnes of maize. After his maize is stolen, he is left with 24 - 5 = 19 tonnes of maize. After he receives the maize donation, he has 19 + 8 = 27 tonnes of maize.