A project has the following net real cash flows $($that is after all costs and tax$).$ Y$1$: R$1000$; Y$2$: R$3000$; Y$3$: R$5000.$ The inflation rate is $6\%$ while the company has a WACC $($the relevant discount rate$)$ of $10\%.$ Calculate the real rate adjusted discount rate and the NPV at this rate. Choose the nearest, most correct option below.

a$.$

R$7145$

b$.$

R$7990$

c$.$

R$8001$

d$.$

R$8224$