The most important equipment in a retail pharmacy

A CALCULATOR OF COURSE.
A good calculator is very important in helping a pharmacist to run his biz.
Most important criteria: It will give accurate answers.

Of all these calculators here, which one i prefer?

Model 1 : Canon LC-210Hi

Pros: Portable
Cons: Too small for my fingers, not very useful, display screen small

Model 2: Unbranded

Pros: Looks attractive, FOC courtesy of Roche
Cons: Buttons at wierd position, calculator slipping away when pressed

Model 3: Casio fx-570s

Pros: Good for complex calculation
Cons: But not suitable for biz ..haha

Model 4: Unbranded

Pros: FOC (courtesy of Boehringer)
Cons: The display screen is reflective to light, button not responsive enough.

Model 5: Canon TX-1210Hi II

Pros: Big screen

Cons: Expensive, space consuming

Model: Canon LS-88Hi II
The winner:
Pros: Reliable, non-slippery, cheap, can use solar and normal battery, correct positioning of buttons, extra large + button, auto off.

Ask the pharmacist
1) Since all the calculators here depends on electronic circuit, it can fail anytime without warning.
So, what do i do? I use this . MUAHAHAHA!Big winner:

Pros: Reliable (this abacus is older than me), does not depends on battery, can use as a weapon, accuracy depends on users (can be very accurate or very inaccurate), it can give any answer that u want...ops.