Cost calculation from Bottomup

Could have been tables aggregated to Year, Month and SKU.

In this case it probably would be best to create a DateTable (dDate) with distinct Year and Month Values.

Additionally I would create a distinct table for SKU (dSKU).

The tables shouldn't be related.

The I added in dDate the following Measure:

Total Cost:=SUMX(dSKU;
var Actual_SKU=dSKU[SKU]
var Date_Value=SUMX(dDate;
	var Actual_Year=dDate[Year]
	var Actual_Month=dDate[Month Number]
	var Cost_per_month=CALCULATE(SUM(fCost[SCC.Ton]);FILTER(fCost;fCost[Year]=Actual_Year&&fCost[Month]=Actual_Month&&fCost[SKU]=Actual_SKU))
	var Value_per_month=CALCULATE(SUM(fValue[Value]);FILTER(fValue;fValue[Year]=Actual_Year&&fValue[Month]=Actual_Month&&fValue[SKU]=Actual_SKU))
	Return Cost_per_month*Value_per_month)
Return Date_Value)

Please check it out.

There would also be the possibilitie of creating dates out of Month and Year and relate them to your date table.