Answer and Explanation:
The computation of the total period cost is shown below:
Variable selling expense $16,000
Fixed selling expense    $15,000
Variable administrative expense $6,000
Fixed administrative expense  $18,000
Total period Cost            $51,000
ANd, the total fixed cost is 
Fixed Manufacturing overheads $30,000  
Fixed selling expenses         $15,000  
fixed admin expenses          $18,000	
Total fixed cost                     $63,000
We simply added all the above items