Christian Missions in Persia. Christianity was introduced in Persia in the Parthian period, and several bishoprics were established there (Latourette, II, pp. 263ff.).
You will likely pay more for the exchange, even if your tank is completely empty. An empty 20 lb tank will hold about 4.7 gallons of propane. That is $18.47 at $3.93 per gallon, which is the low quantity price (I just paid $3.44 per gallon when filling several tanks). The exchange is about the same price. Keep in mind this comparison is as if the exchange gives you a FULL tank.
What todayâs propane price per gallon means for you. In a nutshell, if you lived in Nebraska and needed to fill your 500-gallon propane tank (to an 80% capacity, the safe recommendation, from a 20% capacity - so 300 gallons), it would cost you $462 today compared to $398 last year. That is a $64 difference.