I'd recommend not worrying about acid and base, really.
There are some metabolic conditions that can cause the blood to be too acid or alkaline but these are uncommon and are not the result of diet choices contrary to the acid/alkaline people's recommendations.
The human body is very good at regulating its pH.
It does not take choosing foods to do this.
It does not take leaching calcium from the bones to do it, as these people claim.
Just to illustrate the impossibility of these claims, these authors say the body MUST leach calcium in response to an acidifying diet.
Any teenager who, we can see, greatly increases his skeletal mass in his teen years while having an acidic diet the whole time absolutel disproves this untrue theory.
Don't worry about it. If following good nutrition according to principles that pay no attention at all to acid/base, you'll do fine.
I could go further -- in particular, in how they calculate the whole thing which just comes out to sheer inanity when looked at closely -- but the above counterexample should be enough to show that these people are living in a contrafactual world.
Or lastly: Really, in one million BC was one caveman really saying to another, "Zog, you idiot! Don't you know that that thistle root was acidifying? You must now eat some deer penis, it is alkaline forming!"
So how has a need for personally managing your blood pH by your food choices, otherwise you'll helplessly lose calcium from your bones, only suddenly developed?