tango_gs

quick ratio = [current assets - inv] / [current liabilities]
the same exchange rate will be used in the numerator and denominator under the all current method. the same goes for temporal because both numerator and denominator are monetary. basically you’re multiplying both the numerator and denominator by the same constant so it makes no difference which method you use because they cancel out.
keep in mind that this is not because the temporal method uses the same rate as the all-current method, but because no matter which method you use, the constant you’ll be multiplying by will be consistent in the numerator and denominator for this particular ratio.