title: Running Total without any date filters in DAX
body: <p>I am trying to get a running total calculation for a set of data that does not have any Dates. I have a column with Product Categories and a column with Sales Dollars for each Product Category from the Fact Table. I need to add a running total column as shown below. I am new to DAX and looking for some help on calculating a running total.</p>
  
  <pre><code>Category                Sales $  Cumulative Sales $
  FOOD SERVICE            9051        9051
  HOT FOOD                1880       10931
  GRILL                   1815       12746
  FRESH SANDWICHES        1189       13935
  FRESH BAKERY            1100       15035
  PACKAGED BAKERY         1074       16109
  COLD SNACKS              645       16754
  FAST FOOD                388       17142
  FRESH BAKERY MULTI-DAY   252       17394
  ENTREES/SALAD            180       17574
  NACHOS                   126       17700
  BREAD                    120       17820
  Grand Total            17820    
  </code></pre>