SQL Query Calculating Price based on logic

Hi Experts,
Here is my table records,
SHIPMENT_ID     SHIP_PRICE     SHIP_ADDT_PRICE     PRODUCT_ID     PRODUCT_QTY
1000          3.95          1          12          2
1000          0          0          17          1
1000          6.95          2          11          4
1001          0          0          17          1
1001          12.95          1          12          2
1001          12.95          2          11          4
1002          0          0          17          1
1002          20.95          1          12          2
1002          20.95          2          11          4For Each Shipment:
I need to get maximum shipprice (no need to consider product and qty).
then to manipulate as follows from existing sample records such as
SHIPMENT_ID     SHIP_PRICE
1000          (1*6.95)+(4-1*2)     -- Maximum Price Calculation for particular shipment
1000          (1*0)               -- Other product calculation for same shipment
1000          (4*2)               -- Other product calculation for same shipment
1001          (1*12.95)+(4-1*2)     -- Maximum Price Calculation for particular shipment
1001          (1*0)               -- Other product calculation for same shipment
1001          (4*2)               -- Other product calculation for same shipment
1002          (1*20.95)+(4-1*2)     -- Maximum Price Calculation for particular shipment
1002          (1*0)               -- Other product calculation for same shipment
1002          (4*2)               -- Other product calculation for same shipment
Max Shipprice Row for each Shipment
(SHIP_PRICE)+(remaining PRODUCT_QTY if PRODUCT_QTY>1 + SHIP_ADDT_PRICE)
Other than Max shipprice for each shipment
(PRODUCT_QTY + SHIP_ADDT_PRICE)
I am struggling here with logic how to proceed it, Any suggestions related to this?
Thanks,

Hi,
Sorry to disturb you again, it seems the requirement is not met correct.
The given answer just worked out for that data. May be i have not conveyed correctly.
Here is what i need
Table Records
SHIPMENT_ID     SHIPMENT_PRICE     SHIPMENT_ADDT_PRICE     PRODUCT_ID     PRODUCT_QTY     VIRTUAL_COLUMN (Just for your Reference)
1000          6.95          2               11          4          1
1000          6.95          2               11          4          2
1000          3.95          1               13          2          3
1000          3.95          1               12          2          4
1001          12.95          2               11          4          5
1001          12.95          1               13          2          6
1001          12.95          2               11          4          7
1001          12.95          1               12          2          8
1002          20.95          1               12          2          9
1002          20.95          2               11          4          10
1002          20.95          2               11          4          11
1002          20.95          1               13          2          12
Repeated values in table with Maximum Value,
SHIPMENT_ID     SHIP_PRICE     SHIPMENT_ADDT_PRICE     PRODUCT_QTY     PRODUCT_ID     VIRTUAL_COLUMN
1000          6.95          2               4          11          1
1000          6.95          2               4          11          2
1001          12.95          2               4          11          5
1001          12.95          2               4          11          7
1002          20.95          2               4          11          10
1002          20.95          2               4          11          11*
In this Case, There are two rows same with maximum value for all three shipments,
but need to take one row as maximum and to consider the other as like not maximum row to process the logic
I have considered the Record with VIRTUAL_COLUMN value 1,5 and 10 as maximum value and others as not maximum values
Expected Result (For Each Row) - Just listed for one shipment_id = 1000 here
SHIPMENT_ID     SHIP_PRICE     CALCULATION          STEPS                                        VIRTUAL_COLUMN
1000          41.7          (1*6.95)+((4-1)*2)     Maximum ShipPrice + (PRODUCT_QTY-1)*SHIPMENT_ADDT_PRICE          1
1000          8          (4*2)               PRODUCT_QTY*SHIPMENT_ADDT_PRICE                         2
1000          2          (2*1)               PRODUCT_QTY*SHIPMENT_ADDT_PRICE                         3
1000          2          (2*1)               PRODUCT_QTY*SHIPMENT_ADDT_PRICE                         4*Note: The virtual column in the provided data is just for reference and not exists in table

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