Please Help! Important Titration Question!?

A student analyzed an antacid tablet from a bottle of 48 tablets purchased at a discount store for $1.00. The mass of the tablet was 1.462g. After adding 25.00mL of .8M HCl solution to the tablet, the student back-titrated the excess of HCl with 3.52 mL of 1.019M NaOH solution.
A. Calculate the number of moles of HCl added to the tablet.
B. Calculate the nuber of moles of NaOH required for the back-titration.
C. Calculate the number of moles of HCl neutralized by the antacid tablet.
D. Calculate the mass effectiveness of the tablet.
E. Calculate the cost of one antacid tablet.
F. Calculate the cost effectiveness of the tablet.
I am so confused and have no idea how to go about understanding on bit of this question. I need help bad. Can anyone explain how do go about these and answer them? I have no idea.

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