Shopping in St Louis

The tax for this mug from St Louis is 10.991% (what a strange value but that is what it is). The price tag (which excludes tax) for this mug is $9.95.

What is the amount (including tax) that one has to pay for this mug?

This is in US Dollars.

Does a Starbucks mug cost more or less than it is in St Louis?

Cathedral Basilica of Saint Louis

St Paul's School in Houston

How many white tiles are used to tile the wall of this school? This school is near Houston's Museum of Fine Arts (MFA) and is just next to St Paul's Methodist Church.

Somewhere Between Frankfurt and Singapore on A380

In one section of the aircraft A-380, passenger seats are arranged in 3s and 4s. There are two blocks of 9 rows of 3 seats and a middle block of 10 rows of 4 seats.

How many passenger seats are there in this section?

New York Tomatoes

In some parts of the world, people use pounds (lb) instead of kilograms (kg). This is a photograph of a shop along Broadway in New York City.

Explain how you can find the cost of 6 lbs of these tomatoes (before taxes) without using a calculator.

Chile Car Plates

The older cars have two letters followed by 4 digits while the newer cars have four letters followed by 2 digits.
Assuming that all the letters and digits can be used, find the number of different car registration plates that can be issued by the older method.

Suggest a reason why the new method uses 4 letters followed by 2 digits.