Use this information to answer the following question.

$\backslash$table$[[\backslash$table$[[$Jan$.,1],[8,],[17,],[25,]],\backslash$table$[[$Inventory$],[$Purchase$],[$Purchase$],[$Purchase$]],\backslash$table$[[15$ units @$$4\mathrm{.}00],[60$ units @$$4\mathrm{.}40$