Using 2 Tables to perform functions

Hi, I'm very new to Power Bi, so this might be an easy one for you.

I have a Table 1, which shows all customers entering a supermarket, on a given YYYYMM, and based on an irrelevant criteria, we classify them as a high spender or a low spender.

I also have a Table 2, which shows all customers in the supermarket that have bought Apples. They are shown not as total number of customers but as individual entries for each customer.

I want to figure out how many customers bought Apples as a percentage of how many customers entered the Supermarket, classified as High or Low spenders. 

This is the output I want:

I joined the two tables on YYYYMM, but when I do the following function:

Apples Pct = countrows(Table2)/sum(Table1[Volume of Customers])

I get the right aggregated percentage. But when I try inserting 'Good Bought' in Rows, my count for High and Low shows up the same as the Total value.

When I try building relationships for Spend between the 2 Tables, it gives me an error for ambiguity.

Any advice?