                                                    653

 Widget  N,,  .     
    S125./V, + $108,^,     -
 S80./V, + $108,^.      $25.  , N,
 N,,    , :

$125^V, + $108,33^ = $25 .                        (20.3)

  ,       .  , N,
 N/,    , :

$807V + $108,^ = $0 .                        (2036)

    (20.)  (20.36)     
   .     , :

($125- $80)^,= $25 ,                         (20.3)

 N,  0,5556.      (20.)  
(20.36),   ^ = -0,4103.

     ?  ,    -
    ,     -
  $41,03 (,   0,4103  100- 
     $41,03     -
 $41,03    )   0,5556   Widget.   -
 ,    :

                                   
                    

           0,5556  $125=               0,5556  $80 =
= $69,45                     = $44,45

             -$41,031,0833=           -$41,031,0833=
= -$44,45                   = -$44,45

                  $25,00                       $0,00

       ,   
,        -
  .   ,   $55,56  
0,5556   Widget (  $100  ).  , $41,03 
   .  ,   $14,53 ($55,56 
$41,03)   . ,     -
  .

  ,     :

, = NP, + N,P,,                                (20.4)

 ^ -  ; , -  ; ,, -   ; N, 
Ni,      ,    
.

  

 ,      $14,53    -
, ,     ,    -
      . ,    
$20, ..  .       ,  0,5556
   $41,03.      (..  1 = 0)  $5,47
[$20  (0,5556  $100) + $41,03],       .
   (..  t = )    :