I need help with designing a Python Code App for a restaurant school project. I can't get the sales tax applied to the subtotal of the food item selected. Here is the code I currently have.

ask $=$ input $("$State your name."$)$

print $($f$"$Hello $\{$ask$\}")$

order $=$ input $("$Welcome to Goode to Go Mexican Restaurant. Would you like to place an order? Y for yes N for no$")$

while order $=="$Y$"$:

order$2=$ int$($input$("$What would you like to order? $1,2,3,$ etc."$))$

order$1=$ order$2+10$

print $("$Here are the menu options:"$)$

print $("1\mathrm{.}3$ Carne Asada tacos plate for $$11\mathrm{.}99")$

print $("2\mathrm{.}3$ Chicken tacos plate for $$8\mathrm{.}99")$

print $("3.$Al Pastor tacos plate for $$9\mathrm{.}99")$

print $("4.$Carne Asada burrito for $$15\mathrm{.}99")$

print $("5.$Chicken burrito for $$13\mathrm{.}99")$

print $("6.$Al Pastor burrito for $$14\mathrm{.}99")$

print $("7.$Fountain drink for $$3\mathrm{.}99")$

print $("8.$Jarritos soda drink for $$4\mathrm{.}50")$

print $("9.$Horchata $$4\mathrm{.}50")$

print $("10.$Extra condiments $$1\mathrm{.}00")$

rem $=$ order$1\%11$

if $($rem $=="0")$:

subtotal $="$$$11\mathrm{.}99"$

if $($rem $=="1")$:

subtotal $="$$$8\mathrm{.}99"$

if $($rem $=="3")$:

subtotal $="$$$9\mathrm{.}99"$

if $($rem $=="4")$:

subtotal $="$$$15\mathrm{.}99"$

if $($rem $=="5")$:

subtotal $="$$$13\mathrm{.}99"$

if $($rem $=="6")$:

subtotal $="$$$14\mathrm{.}99"$

if $($rem $=="7")$:

subtotal $="$$$3\mathrm{.}99"$

if $($rem $=="8")$:

subtotal $="$$$4\mathrm{.}50"$

if $($rem $=="9")$:

subtotal $="$$$4\mathrm{.}50"$

if $($rem $=="10")$:

subtotal $="$$$1\mathrm{.}00"$

ask$2=$ input $("$Okay$.$ Would you like to order more? Y for yes N for no$")$

if ask$2=="$N$"$:

#sales tax

print$("$Thanks for ordering! The grand total is listed below."$)$

print$($total$)$

quit$()$