readme update

README.md

@@ -107,12 +107,12 @@ about prices.
 
 [PCBWAY](http://www.pcbway.com) produced [ULX3S v1.7 45F](/pic/ulx3sb-v17.jpg) in
 December 2017 at above of CLASS 3 quality, $126 per
-board. [PCBWAY](http://www.pcbway.com) produced [ULX3S v1.8 85F](/pic/ulx3sb-v18.jpg) in 
-May 2018. Boards look to me like on the edge of CLASS 1 quality acceptance
+board. They produced [ULX3S v1.8 85F](/pic/ulx3sb-v18.jpg) in 
+May 2018. Boards look like on the edge of CLASS 1 quality acceptance
 (drill randomness and copper layer 
 misaligment, [some holes have breakout near 180°](/pic/ulx3sb-v18-breakout-c19.png)),
 while they claim it is still CLASS 2 compliant.
-Chargedd $134 per board but agree to return money. [PCBWAY](http://www.pcbway.com) is
+They charged $134 per board but agree to return money. [PCBWAY](http://www.pcbway.com) is
 cheap at boards and assembly but 
 charged $40 for FPGA 85F chip which costed about $30 on [Mouser](http://www.mouser.com) at
 that time.