SQL Aggregation of primary keys

Question

So I have two tables in my sample database:

Table #1:

PRODUCT_ID     TYPE    DATE    CONSUMER_ID

where PRODUCT_ID is the primary key.

Table #2:

PRODUCT_ID     ORDER_DATE    SENT     RETURNED

which contains possible duplicates of PRODUCT_ID

I want a query which returns :

CONSUMER_ID   TOTAL_PRODUCTS   TOTAL_SENT   TOTAL_RETURNED

Since I am fairly new to SQL, I cannot seem to join the two tables to get the meaningful data so any insight on this will be highly appreciated.