I owned an acs and cant say that ive ever heard of N. unless theyre referring to a neutral base but thats not teferenced correctly. the Y after the number refers to an ounce, however the calculations of fhe numbers and the y are calculated in 1:48ths. so i cams up with converting them to teaspoons. i dont have it in front of me but i think it takes 8 to make a teaspoon so 1y would be 6 teaspoons. im saying this by memory but i think thats close. hope it helps. and yes yiuvare correct, the letters are universal color codes for the timt
Q
the stairs
Q