Commerce: general degree, major/double major in anything such as Accounting, Actuarial Studies, Business Law, Business Economics, Finance, Financial Economics, Human Resource Management, Industrial Relations, Information Systems, International Business, Management, Marketing, Tourism and Hospitiality...
Economics: still general degree, and u can choose all the majors from commerce, except one of your majors has to either be Economics, Econometrics, Financial Economics or Economic History
Business: Same as commerce, but with different name..apparently more "hands on" and practical/applicable to modern businesses (UTS)