'How to convert a string value to float value

I have these quantities and i want to transform it to a float variable, but i have to quit the letter at the end, I tried like the next code:

A=6574.6A
B=977.020A     
C=1085.00A  
D=33.133A
s=float(A)
print(s)

But it doesn't work, because I have a until the end. How could I remove the letter and just have the numeric value? I can't remove it manually because I have a huge list of values.



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