I might be misunderstanding you, but is this what you want?

>>> print '{:.2f} {:<20}'.format(1.0, 'kg/hr')
1.00_kg/hr_______________

Is this what you intended?

>>> print "{:>25.2f}".format(34)
                34.00

Note, my spaces may be different to yours (the spaces I have is the same distance from your example).

This is what appears for me:

Now with f-strings available in python 3.6 and newer, here is another way to look at it:

print(f"{(f'Tax = ${tax:.2f}'):>70}")

Using temporary variables:

rightSideStuff = f'Tax = ${tax:.2f}'
print(f"{rightSideStuff:>70}")

The resource I used for finding how to align right: https://medium.com/@NirantK/best-of-python3-6-f-strings-41f9154983e

This shows an example of how to format your output with two decimal points using the older % formatting method:

v1 = 55.39
v2 = -1.15
v3 = 6.54
v4 = 0.00

print '%8.2f   %8.2f' % (v1, v2)
print '%8.2f   %8.2f' % (v3, v4)

the corresponding output:

   55.39      -1.15
    6.54       0.00

Alternatively, you can use the "new and improved" .format() function which will be around for a while and is worth getting to know. The following will generate the same output as above:

print '{:8.2f}  {:8.2f}'.format(v1, v2)
print '{:8.2f}  {:8.2f}'.format(v3, v4)

Both sets of formatting directives allocate 8 spaces for your number, format it as a float with 2 digits after the decimal point. You'd have to adjust these values to fit your needs.

Using this approach to format your output will be easier I think since .format() will give you a lot of control over the output (incl. justifying, filling, precision).

You could use:

print('{:<15}: {:>10.2f}'.format('Bonus', bonus),sep='') 

The > takes care of right alignment while the .2f takes care of the decimal points.