Option A.2

http://www.digikey.com/product-detail/en/DS18B20U%2BT%26R/DS18B20U%2BT%26RCT-ND/3894805

$4.49 for a surface mount version of the temp sensor

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	Subtotal	Qty
Solid State Relay - 8A Retired COM-10636 RoHS	4.95	1 Cannot be ordered at this time.
One Wire Digital Temperature Sensor - DS18B20 Retired SEN-00245 RoHS	3.95	1 Cannot be ordered at this time.
ATMega328 - TQFP Retired COM-09261 RoHS	4.25	1 Cannot be ordered at this time.
	Total: 13.15