Please show work so I know how to solve similar problems.

Below is a project WBS with cost apportioned by percent. If the total project cost is estimated to be $590,000, what are the estimate costs for the following deliverables? (Round the final answers to the nearest dollar.) All of the follnwing are woaknosens inhoront in thic natimating annroach EXCEPT: (Click to select) It requires good, realistic historical data. The project must be very similar to past projects for estimates to be useful It requires significant time to develop estimates. If total cost estimate is off, all other costs will be off