You can sum variables or record/column locations easily using the COMPUTE statement in the Glossary.
The syntax is:
COMPUTE new variable (or record/column location) = variable (or record/column location) A (number of variables (or record/column locations)
Example 1: Adding ten variables
COMPUTE TOTAL_AMOUNT = AMOUNT_1 A10
meaning, "add the next 10 values beginning in variable AMOUNT_1 and store the results in variable TOTAL_AMOUNT."
Example 2: Adding ten record/column locations
COMPUTE 1/100:2 = 1/5 A10
meaning, "add the next 10 values beginning in record/column location 1/5 and store the results in record/column location 1/100:2."
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