
Christopher O. answered 03/15/19
Finance & Accounting Tutor with 9+ years of teaching at 3 universities
Begin with the end in mind: working capital is the difference between current assets and current liabilities. Written as an equation, then, we have:
WC = CA - CL
Next, go to the balance sheet. Current assets should be segregated from non-current assets. So, be sure you are choosing current assets. The same is true on the 'right hand side' of the balance sheet (i.e., the liabilities).
If your question is for an academic setting, it's likely your professor has already provided you the figures for CA and CL, so you life is a breeze. Or, the professor has given you summary information from the balance sheet, which should also make your life relatively easy.
Either way, Working Capital is reasonably straightforward--apply the equation!
Christopher