Answer the following question with proper theoritical and mathematical expression properly-

7. Stainless steel, type 304 having a density of 7.86 g/cm^3, has been used in some reactors. The nominal composition by weight of this material is as follows: carbon, 0.08%; chromium, 19% ; nickel, 10% ; iron, the remainder. Calculate the macroscopic absorption cross-section of SS-304 at 0.0253 eV