Trouble Creating (what I think should be a) Simple Measure

I have two tables in my source data (there's more, but those are the pertinent ones), Application and Transactions. An application can have one or many transactions. I have denormalized them into one table, ApplicationTransactions in Power BI. There is a column on the source Application table named EstimatedAmount. Because it's denormalized, EstimatedAmount gets repeated on every row because of multiple matching transaction rows. Here's my data:

I'm trying to create two measures for use in a chart like the one pictured below. The measures I'm trying to create are the Total Estimated Amount per application, and the Average Estimated Amount per application, like this:

I am trying to create the measure for the TotalEstimatedAmount and AverageEstimatedAmount. I know it has to be simple, but I can't figure it out.

There is a .pbix file with the above data on OneDrive here.

Thanks,