well, if you are going to test the following (from petmountain.com)(drsfostersmith is blocked at work):
PH $3.59
High Range PH $4.39
Nitrite $4.39
Nitrate $5.19
Ammonia $5.89
Total: 23.45
All of these comprise APIs Master Test Kit, $21.95
for a savings of less than two dollars. If you know you will NEVER test your high range ph (if you have very soft, acidic, low ph water) then by not getting the high range ph test you are saving money.)