I would like to seek advice from experts regarding the issue of raw material consumption in the polyvinyl alcohol production process

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I would like to ask the experts here: The following are the material consumption figures for each step in the production of polyvinyl alcohol, as quoted from a book. I wonder if they are correct.

Step 1: Materials for synthesizing vinyl acetate – acetylene: 322 kilograms, acetic acid: 720 kilograms, catalyst: 4.5 kilograms, fresh water: 125 tons, electricity: 200 KW per hour, steam: 2.8 T per ton.

Step 2: The vinyl acetate produced in Step 1 is mixed with the initiator diisobutyronitrile, and after 4–6 hours of polymerization, 2/3 of polyvinyl acetate (PVAC) is obtained.

Step 3: Synthesis of PVA. The specific ratio of materials used is as follows: polyvinyl acetate:methanol:sodium hydroxide:water = 1:2:0.01:0.002.

Question 1: When using calcium carbide to produce acetylene, how much acetylene can be produced from one ton of calcium carbide?

Question 2: Are the ratios of the various materials used in Step 3 correct? How much polyvinyl acetate is needed to produce one ton of PVA? Moreover, according to this ratio, two tons of methanol are required to produce one ton of PVA – is that too much? Will all of this methanol be consumed? I would be very grateful if anyone who knows the answers could provide some guidance.