I want split number in STRING below in two different column. Right now only able to extract one.

Column B6 = "Buy only when USD50 and not over USD70"

Column C6 Formula =LOOKUP(99^99,--("0"&MID(B6,MIN(SEARCH({0,1,2,3,4,5,6,7,8,9},B6&"0123456789")),ROW($1:$10000))))
Column C6 Answer = 50

Column D6 Formula =LOOKUP(99^99,--("0"&MID(B6,MIN(SEARCH({0,1,2,3,4,5,6,7,8,9},B6&"0123456789")),ROW($1:$10000))))
Column D6 Answer = 70

I also want to 70 but cant figure out the right. Can somebody help. Thanks