updated some prices

ring.json

@@ -15,7 +15,7 @@
 			"name":"nrf52",
 			"serial_number":"",
 			"subdirectory_path":"rf/nrf52832",
-			"dev_board_price":7.0,
+			"dev_board_price":6.0,
 			"dev_board_sales link":"",
 			"ic_price":0.0,
 			"ic_sales_link":"",
@@ -35,7 +35,7 @@
 			"name":"nrf52 ble",
 			"serial_number":"",
 			"subdirectory_path":"rf/nrf52832_ble",
-			"dev_board_price":7.0,
+			"dev_board_price":6.0,
 			"dev_board_sales link":"",
 			"ic_price":0.0,
 			"ic_sales_link":"",
@@ -107,7 +107,7 @@
 			"name":"RaspberryPi, PythonGPIO",
 			"serial_number":"",
 			"subdirectory_path":"gpio/raspberrypi",
-			"dev_board_price":41.94,
+			"dev_board_price":37.00,
 			"dev_board_sales_link":"",
 			"ic_price":0.0,
 			"ic_sales_link":"",
@@ -117,7 +117,7 @@
 			"name":"RaspberryPi, C",
 			"serial_number":"",
 			"subdirectory_path":"gpio/raspberrypi",
-			"dev_board_price":41.94,
+			"dev_board_price":37.00,
 			"dev_board_sales_link":"",
 			"ic_price":0.0,
 			"ic_sales_link":"",
@@ -137,9 +137,9 @@
 			"name":"XMega8E5",
 			"serial_number":"",
 			"subdirectory_path":"gpio/8E5",
-			"dev_board_price":2.30,
+			"dev_board_price":3.00,
 			"dev_board_sales_link":"",
-			"ic_price":3.00,
+			"ic_price":2.30,
 			"ic_sales_link":"",
 			"ring_period":0.252
 		},
@@ -177,7 +177,7 @@
 			"name":"NRF52",
 			"serial_number":"",
 			"subdirectory_path":"gpio/nrf52",
-			"dev_board_price":7.00,
+			"dev_board_price":6.00,
 			"dev_board_sales_link":"",
 			"ic_price":3.00,
 			"ic_sales_link":"",