# we have three Strings here that are holding numbers
a = "100"
b = "50.75"
c = "-3.2"

# conver the Strings into numeric data types
d = int(a)
e = float(b)
f = float(c)

# compute the sum
answer = d+e+f

# output
print ("the sum of", a, b, "and", c, "is", answer)