Query taking WAY to long to run

mercredi 22 avril 2015

I have a query that gets me the totals sales per item. I have a tblShowSales with items (From a drop down list, I believe I should NOT be using a drop down list, correct?) and the quantity. The query Groups the items, and get the sum of the items. But the problem I have, is that the query either A( takes a LONG time (10-15 minutes to run) or B( doesnt run at all and access crashes. And before you ask, yes I have the fields indexed. Also tblShowSales has only 13K records, ive seen people complaining about this same thing is 13M records. So what im I doing wrong?
Query taking WAY to long to run

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