make prices for projectiles

rules.tex

@@ -524,6 +524,20 @@ An average villager will make little spare money -- perhaps 10 \gls{sp} in a yea
 
 \end{tcolorbox}
 
+\begin{tcolorbox}[arc=1mm,tabularx={p{.3\textwidth}XX}]
+
+	\textbf{Projectiles} & \textbf{Weight}  & \textbf{Cost} \\\hline
+
+	Crossbow &  1/3 &  {20 sp} \\
+
+	Longbow &  -4/-2 &  {10 sp} \\
+
+	Shortbow &  -5/-3 &  {5 sp} \\
+
+	Throwing knives &  -5/-3 &  {100 cp} \\
+
+\end{tcolorbox}
+
 \subsection{Working Beasts}
 
 Animal stats vary, but you can use the below as a go-to standard for working animals.