Determining missing items in return and residual income computations

Data are presented in the following table of returns on investment and residual incomes:

$\backslash$table$[[\backslash$table$[[$Invested$],[$Assets$]],\backslash$table$[[$Operating$],[$Income$]],\backslash$table$[[$Return on$],[$Investment$]],\backslash$table$[[$Minimum Return$],[$on Investment$]],\backslash$table$[[$Minimum Acceptable$],[$Operating Income$]],\backslash$table$[[$Residual$],[$Income$]]],[$$$800,000,$$$176,000,($a$),12\%,($b$),($c$)],[$$$520,000,($d$),($e$),($f$),$$$62,400,$$$20,800$