Solly will discharge a debt of R500 000 six years from now, using the sinking fund method. The debt's interest is 15,6% pe The sinking fund will earn interest at a rate of 8,4% per year, compounded monthly. The total yearly cost to discharge the debt (to the nearest rand) will equal a. R42 000. Ob. R78 000. ○ C. R93 834. Od. R142 375.​