Looking at replacing my food with Soylent, is it actually this expensive?

Hello,

I am new to the world of Soylent and meal shakes, but I am looking to replace my meals with Soylent completely. However, looking at the subscription prices, it seems rather expensive to replace all of my meals with Soylent.

Assuming I drink 4 shakes per day, buy the prepaid subscription, and I buy a 36 bottle set which would last 9 days, that would be around 110 US. Now given that one set goes for 9 days, that would mean I need to buy around 3.4 sets per month, which I would round up to 4. That's 440 US per month to replace all of my meals. We can guesstimate down to 400-420 US after the first month if I have extras from the first month. This seems quite steep for meal replacement, but I am new to this.

Please correct me if my math is wrong as I would actually like to invest in this long term as a result of my eating disorders. In addition to some essential groceries + occasionally going out, that bill seems more expensive than if I bought regular groceries and ate at home daily. Thanks in advance.