adding a 'sum' function

[DART43]

How does one add a function that will sum the values input ? eg.
'time-keeping'
user selects tasks from a list and records time worked against them. how to
sum up his total time worked ? thanks

 

[pietlinden]

How does one add a function that will sum the values input ?  eg.  
'time-keeping'
user selects tasks from a list and records time worked against them.  how to
sum up his total time worked ?     thanks

with a query or use DSUM.

 

[DART43]

thank you. DSUM looks like that is what I need.