Labor Cost/Task Technique

A cost matrix is derived from experience, for example: 
  Tasks    Requirements   Design   Coding   Test   Subtotal
Function

interface     1.0          2.0      0.5     3.5     7
2D GA         2.0         10.0      4.5     9.5    26
3D GA         2.5         12.0      6.0    11.0    31.5
 ....

Total        14.5         61       26.5    50.5   152.5
(man-months)

Rate          $2000       $4800    $4250  $4500
($/man-months)

Cost        $75,400  $292,800  $112,625 $227,250 $708,075