Managerial Accounting

During the first term, this is how accounting looks to engineers. Some go on to master it while some (like me) have recurrent nightmares even after that stuff is long gone. They said accounting is just numbers. But double and triple integrations coupled with triple partial differentiation and approximate methods seem so simple compared to 'just numbers'. This might give an idea of how the cases, problems and the exams looked to me
Question: Count the number of dots in the figure below.