Concept:Total income in a cash book is the sum of all amounts received as income during the month.Explanation:The business received commission of D180,000.The other receipts during February 2019 were D98,000.To get the total income, add both amounts together.D180,000+D98,000=D278,000.Therefore, the total income for the month of February 2019 is D278,000.Answer:A. D278,000