Answer:
a) The expected transaction price with variable consideration estimated as the expected value is  $4,773.
b) The expected transaction price with variable consideration as the most likely amount is $4,730
Explanation:
a)
                                  Probability  Total
Base Fee              $4,300              Fixed   $ 4,300
20% Variable consideration  $860 (= 0.2*4,300)  25%   $215
10% Variable Consideration  $430 (= 0.1*4,300)  60%    $258
0% Variable consideration  $ -                   15%        $ - Â
                                            Total       $4,773
it is most likely that the project would be finished in 1 week earlier.
b)
Base Fee                 $4,300      Fixed      $ 4,300
10% Variable Consideration      $430                $430
                                        Total         $4,730