Assigning Cost in P6

Hi, 

Can i know if i assign the cost correctly in P6? 

I am assignning a fixed price lump sum to my activities.

Firstly, i set the labour budgetted unit to $1/day 

I then, i set the budgeted unit to 43,750.00 so my cost for that activity is £43,750.00. 

With this method, i can use the histograme to see my cost and when i progress the activities, i can see the remaining cost, budgetted cost and actual cost. 

I am not sure if i am doing it right method? can anyone please enlighten me please. 

The problem with this methid is i have 2 resources in the programme. 

Many thanks

Mike