$\backslash$table$[[,2019,2020],[$Item$,$Price,Quantity,Price,Quantity$],[$Books$,$$$2,7,$$$10,9],[$Pens$,$$$3,3,$$$7,8]]$

In $2019$ and in $2020,$ consumers in Dexter purchased only books and pens. The prices and quantities for $2019$ and $2020$ are listed in the table. The reference base period for Dexter's CPI is $2019,$ and $2019$ is also the year of the Consumer Expenditure Survey. What is the inflation rate in $2020?$

$295\mathrm{.}7$

$195\mathrm{.}7$

$91\mathrm{.}0$

$395\mathrm{.}7$

$0\mathrm{.}3$