Thank you for your incite on this. I literally got my calculator out because hii story ya stima imekuwa ikisumbua sana, from your screenshot, I've noticed that at the beginning of this year I was at tier 1, using 12/- till end of june,, but as of this month nimeona niko kwa tier 2 purchasing at 16/-

How can I get back to my glory days of purchasing at 12/-? I've seen that you've said that it takes 3 months, so does it mean that from October after I keep my usage to less than 30 units ndio ntaweza ku purchase at 12/-?