Repurchase rate

I am trying to create a report that graphically shows per the given time period in the graph, the repurchase rate, number of orders and the number of orders where there were a repurchase.

I have the data:

1. OrdNo as unique identifier for the orders
2. CustNo as identifier for the customer on the order
3. Date column
4. +Columns to filter on

I need:

1. Calculated column/Measure with the number of orders
2. Calculated column/Measure with the number of orders that has a reccuring order in the last 12 month
3. Calculated column/Measure with repurchase rate

I tried:

1. Calculated column: # Purchases
   

# Purchases = 
CALCULATE(
    COUNTROWS('NOR Orders'),
    FILTER(
        'NOR Orders',
        'NOR Orders'[Gr] < 3
    ),
    FILTER(
        'NOR Orders',
        'NOR Orders'[CustNo] > 0
    ),
    FILTER(
        'NOR Orders',
        'NOR Orders'[OrdDt] > 0
    ),
    FILTER(
        'NOR Orders',
        'NOR Orders'[OrdTp] = 1
    ),
    FILTER(
        'NOR Orders',
        'NOR Orders'[TrTp] < 4
    ),
    FILTER(
        'NOR Orders',
        'NOR Orders'[CIncSF] > 0
    )
)

• Calculated column: # Repurchases 12 month
  

# Repurchases 12 month = 
CALCULATE(
    COUNTROWS('NOR Orders'),
    DATESINPERIOD(
        'NOR Orders'[Date],
        'NOR Orders'[Date]-YEAR(1),
        1,
        YEAR
    ),
    FILTER(
        'NOR Orders',
        'NOR Orders'[Gr] < 3
    ),
    FILTER(
        'NOR Orders',
        'NOR Orders'[CustNo] > 0
    ),
    FILTER(
        'NOR Orders',
        'NOR Orders'[OrdDt] > 0
    ),
    FILTER(
        'NOR Orders',
        'NOR Orders'[OrdTp] = 1
    ),
    FILTER(
        'NOR Orders',
        'NOR Orders'[TrTp] < 4
    ),
    FILTER(
        'NOR Orders',
        'NOR Orders'[CIncSF] > 0
    ),
    FILTER(
        'NOR Orders',
        EARLIER('NOR Orders'[CustNo])='NOR Orders'[CustNo]
    )
)

• Calculated column: # Repurchase rate 12 month
  

# Repurchase rate 12 month = 
DIVIDE(
    'NOR Orders'[# Repurchases 12 month],
    'NOR Orders'[# Purchases]
)

I cannot seem to get it right, as for my numbers it simply does not add up.

I looked at Divide as Pivot Table in the forum as it seemed like a viable solution, but it did not work for me.

Any other tips and trix?