Economics is available through both the Bachelor of Arts and Bachelor of Commerce. Economics is the study of how markets work, on a global (macro) and local (micro) level.
Introductory microeconomics and macroeconomics are core level 1 subjects, so you get to have a feel for the subject before you commit to it overall. Keep in mind, however, that it is a maths intensive major in second and third levels; this includes a compulsory level 3 econometrics subject (econometrics sounds scary, but it is statistics for economics). Given that Quantitative Methods 1 is a compulsory level 1 subject, and available in both first and second semester, it might be a good idea to keep the information fresh by taking it second semester and picking up one of the core statistic subjects in first semester of your second year. Other than that, however, you’re able to choose whatever other subjects that you’d like through the economics major; there are a lot of subjects available at the second and third levels, so there’s definitely something that will interest you. Keep an eye out for Jeff Borland; he was one of the most popular lecturers in the entire university, and if you’re lucky, he might come back to a subject you’re interested in. Cost wise, look out for second hand copies of your textbooks, as each one comes in at about $130 a pop, and there aren’t too many changes between the years. You will also need a scientific calculator for much of the econometrics and maths.