Totals by SKU and Region

Update the output cells so each row shows the total units for transactions that match both the SKU in column B and the Region Key derived from column C. Transactions are displayed on the right table in columns F:H. The Region Key is the first letter of the Region name (North → N, East → E, South → S, West → W). See Examples

Your solution should use cell references so it updates automatically if the input cells change values.

A1
fx

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