Magical addition

The sum of all Roman numerals in each row and column is equal to the same number
Fill in the blanks with the given Roman numerals, each Roman numeral must be used and can only be used once to achieve the above goals and complete the game
The sum of all Roman numerals in each row and column is equal to the given fixed number
Select the appropriate number from the given Roman numerals in each row and column, so that the sum of the vertical and horizontal digits equals the given Roman numerals, to achieve the above goals and complete the game