Conversion of line via awk or etc

Hello friends, could you help me about problem with my data lines. I suppose a simple awk code may help me.

I have following data lines: (first line including 3 numbers and then a matrices of 4x10)



How can I convert this format to

first line sum of 3 numbers at the first line ---> 549
second line is converted to 1x40 ----> 1 A B 4 5 6 7 8 9 ..... Z P R


Could anyone help ?

thanks