Alright, lets get started.
The admission to the museum is $12.50 plus tax per person.
So, the adimission fees for two person will be =
$ per taxes
The tax is 7.25 % so, in total admission fees will be =

Total admission fees =
$
Zalia has a sandwich for $5.95, an apple for $1.25 and a drink for $1.69.
So, total expences on her fooding will be =
$
Now expense value adding tax will be =
$
She also tips her server 15%, amount of tip in her fooding expences =

So, all payment will be =
$
It means Zalia pay all total $ 37.68 for her day at the science museum. : Answer
Hope it will help :)