Increase BP special prices with a fix ammount

Dear experts

I want to change the existing BP special price for one item to all customers, increase it with +2 Euro.

Example:

Before:

Customer A  -  Item 4711  -  BP special price  5,00 Euro

Customer B  -  Item 4711  -  BP special price  4,00 Euro

After:

Customer A  -  Item 4711  -  BP special price  7,00 Euro

Customer B  -  Item 4711  -  BP special price  6,00 Euro

With the function "specialpricesglobal update"  you can only increase a % -value, notto afixedEurovalue.

Do you havesuggestionsforhow Icanproceedfastest?



Thanks forcreative ideas.

Sebastian