If you are sure about this I will fix it. I didn't write this script but we are using it with permission.
How much is a "stone" anyway?
And whats a quid, bob, pence etc, makes no pense whatsoever.
Just tried again, US and UK gallons are backwards

A Stone is fourteen Pounds and a Pound is sixteen Ounces
A Quid is also a Pound but in monetary terms and equivalent to the American Dollar in like for like terms.
A Bob is a slang term for One Shilling (our pre-decimal currency and equates to 5 new pence)
A Pence (or Penny using the proper terminology) is 1/100 of a Pound (or Quid in slang). It is the equivalent of the American Cent in like for like terms.