Estimating Individual Cost based on Total Costs

I have a dataset of projects, details, and total costs from which I want to extrapolate the cost of each component of each project. Does anyone have any suggestions on how to approach this? While my actual data set is more complex with more variables, I've created a sample data set that I think is sufficient in working out a methodology. 

I've uploaded a pbix file with the sample data here:

https://drive.google.com/file/d/1HWl8WO7ZfexQTuZPhpBat0lp6PB3XwuI/view?usp=sharing 

My ultimate goal is to have the user build a new "order" that will produce an estimate and perhaps a range (minimum and maximum). You can see a concept of the final result in the Report View of the pbix file above.

This data will be "live" in a sense - more data will be added over time. The idea is that as more data is added, it would improve the  algorithm to estimate costs.

I should note that when I created the attached data set, I used consistent costs for the components when coming up with the total costs. But in the actual data, costs are variable (hence the need for a cost estimating tool).