price difference for #5458+#5593+#5628 replacement ring

paid total $738,4 in #5458+#5593+#5628. 

So the final price difference is $211.1=($1055*0.9)- $738.4 (including 10% off)
A)$1055 for this ring with a 3.5ct DEF color elongated cushion moissanite center, moissanite accents in 14k white gold. Size 7.5. 
B) 2mm band width  , euro shank
C) We will start this customization when the original ring is returned