I have a spreadsheet with a list of orders for a given month. For each order the item SKU is listed. I need to find the total quantity of each item ordered in a given month. All SKU’s are in the same column, so the column looks like:

SKU1

SKU1

SKU1

SKU1

SKU2

SKU2

SKU2

SKU3

SKU3

I need to find the total number of each SKU, so for above

SKU1=4

SKU2-3

SKU3=2

Is there a quick way to do this without counting the rows manually?