The requirement of assimilatory power to fix 6 molecules of Co₂ is?

To fix 6 molecules of carbon dioxide 18 molecules of ATP and 12 molecules of NADPH are consumed. The reaction is shown below:
6CO2 + 18ATP + 12NADPH + 12H2O → C6H12O6 + 18ADP + 18Pi + 12NADP+ + 6H+