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%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
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\usepackage{MnSymbol}           % Symbols
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% Document Info
\author{bnoland}
\pdfinfo{
  /Title (pharmacy-math-cheat-sheet.pdf)
  /Creator (Cheatography)
  /Author (bnoland)
  /Subject (Pharmacy Math Cheat Sheet)
}

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% Header and Footer
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\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
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    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
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\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Pharmacy Math Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{bnoland} via \textcolor{DarkBackground}{\uline{cheatography.com/145952/cs/31490/}}}
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\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}bnoland \\
  \uline{cheatography.com/bnoland} \\
  \end{tabulary}
\vfill
\columnbreak
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  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Not Yet Published.\\
   Updated 30th April, 2022.\\
   Page {\thepage} of \pageref{LastPage}.
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  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
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\end{multicols}}




\begin{document}
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% Set font size to small. Switch to any value
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% www.emerson.emory.edu/services/latex/latex_169.html
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\begin{multicols*}{3}

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PO & by mouth \tn 
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% Row 1
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PRN & as needed \tn 
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hs & at bedtime \tn 
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\# & quantity \tn 
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\mymulticolumn{1}{x{5.377cm}}{{\bf{When to use:}} when you have to mix two solutions of different concentrations to prepare a final solution of the required concentration. \newline % Row Count 3 (+ 3)
{\bf{What to do:}}Make a grid with the goal solution in the middle, the lower strength \% in the lower left, and the higher strength \% in the upper left. Subtract across to the opposite corners of the grid. Add the two resultant parts of both \% strengths and the result is the total parts ratio needed to make the desired strength. Now figure out how much of each solution should be added to equal the final concentration: \newline % Row Count 12 (+ 9)
"Prepare 1000mL of 40\% solution of amino acids using 70\% amino acids and 30\% amino acids solution." \newline % Row Count 14 (+ 2)
70 |   ~~ |10  (meaning 10 parts of the 70\%) \newline % Row Count 16 (+ 2)
-{}-{}-{}-{}-{}-{}-{}-{}-       \newline % Row Count 17 (+ 1)
~~~~~|40|     \newline % Row Count 18 (+ 1)
-{}-{}-{}-{}-{}-{}-{}-{}- \newline % Row Count 19 (+ 1)
30 |  ~~~  | 30   (meaning 30 parts of the 30\%) \newline % Row Count 21 (+ 2)
10 + 30 =  40 \newline % Row Count 22 (+ 1)
Needed volume from the problem is: 1000mL / 40 = 25mL per part. \newline % Row Count 24 (+ 2)
Take the values from the grid:  \newline % Row Count 25 (+ 1)
10 X 25mL = 250mL of the 70\% solution. \newline % Row Count 26 (+ 1)
30 X 25mL = 750mL of the 30\% solution. \newline % Row Count 27 (+ 1)
(Checking: 750mL + 250mL = 1000mL) \newline % Row Count 28 (+ 1)
Simplified: 1 part 70\% solution to 3 parts 30\% solution, or 1:3 70\%:30\%. \newline % Row Count 30 (+ 2)
} \tn 
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} \tn 
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% That's all folks
\end{multicols*}

\end{document}