replace function

[Mif]

I want to replace the last two characters in a field called "goal_score_perAction_textversion" with the value of the field called "score".

eg: goal_score_perAction_textversion "g100_s45"

score value is "70"

I want the result "g100_s70"

My current calcualation;

Replace ( action_scores::goal_score_perAction_textversion; Right ( action_scores::goal_score_perAction_textversion; 2); 2; action_scores::score)

is producing this; "g100_s4570"

[sbg2]

Left(action_scores::goal_score _perAction_textversion; Length(action_scores::goal_score _perAction_textversion) - 2) & action_scores::score

[Mif]

Thank you very much!