PUSH
PUSH statement in column M which saves all values in the cells in columns A to K on the same row as the PUSH statement on a memory stack.
PEEK
PEEK statement in column M which writes values -saved on top of the memory stack- in the cells in columns A to K on the same row as the PEEK statement.
POP
POP statement in column M to remove the saved values -by the last PUSH statement- from the top of the memory stack.