The total number of days used in this project is 6+5+4+ 1= 16 days.

On average, no one should do it for four days.

In fact: A did it for 6 days, more than 2 days; B is 5 days, exceeding 1 day; C did it for four days. D worked 1 day, and worked 3 days less.

Then, C can only finish his work, and should not take money from D, he can only take money from the boss!

D's 48 yuan money is 48÷3= 16 yuan per day, calculated as three days less work.

And a is equivalent to completing his own work and helping D 2 days.

So A should get 16×2=32 yuan.