awk-col-sum

#!/bin/sh

awk ' \
{ \
	for (i=1; i<=NF; i++) { \
		sum[i] += $i \
	} \
} \
END { \
	for (i=1; i<=NF; i++) { \
		printf "%s", (i<NF) ? sum[i] OFS : sum[i] ORS \
	} \
} \
'