A doctor's prescription calls for a daily intake of a supplement containing 40 milligrams (mg) of vitamin $\mathrm{C}$ and $30 \mathrm{mg}$ of vitamin $\mathrm{D}$. Your pharmacy stocks three supplements that can be used: one contains $20 \%$ vitamin $\mathrm{C}$ and $30 \%$ and a third, $30 \%$ vitamin $\mathrm{C}$ and $50 \%$ vitamin $\mathrm{D}$. Create a table showing the possible combinations that could be used to fill the prescription.