Calculate the missing values and express your answers rounded to two decimal places.

$\backslash$table$[[,$Cost,$\backslash$table$[[$Amount$],[$of$],[$Markup$]],\backslash$table$[[$Selling$],[$Price$]],\backslash$table$[[$Rate of$],[$Markup$],[$on Cost$]],\backslash$table$[[$Rate of$],[$Markup$]]],[$a$.,,$$$270\mathrm{.}00,25\mathrm{.}00\%,\%,],[$b$.$ $$50\mathrm{.}00,,,\%,32\mathrm{.}00\%,]]$