Regarding packing

Hi gurus

i have done packing of the material mat01, mat02, mat03 three material in single package and now i want the packing size of the combined three items to be reflected in the bill (invoice) i have the packing material mainted in Mat Master and taken the size and lenght and breadth but how to move it to the vf01

or print in invoice

Points will be rewarded

Rajesh