I want to add up cells only if they are more than 0. I can do this if it is a range of cells but i can't add them if it is just a string of cells.

for example

add Y1323+Y1330+Y1337+Y1344+Y1351+Y1358+Y1365+Y1372+Y1379+Y1386+Y1393+Y1400+Y1407+Y1414+Y1421+Y1428+Y1435+Y1442+Y1449+Y1456+Y1463+Y1470+Y1477+Y1484+Y1491 only if the contents of the cell is greater than 0