The letter brings up an interesting point I haven't considered.   As if M97 isn't convoluted enough as is.
"The Legislative Revenue Office says Measure 97 would cost families only an additional $600 per year."  That's a roundabout way of saying consumers would pay 80% of this measure when you do the math. 
To promote this measure as a tax on corporations is less than a half truth and having the poor being taxed on basic necessities is wrong.
Vote No on M97