How to display a formula for calculating data from a table?

Question

Mathematics

There is a table with data:

There are 5 variables in this table:
1 working day
3 working days
1 sided
2 sided
Number of pieces with a step of 100

The results of calculations in the table are. What formula to choose so that data from it can be easily obtained using 3 variables (I am working on an online calculator)? You can use the following arithmetic operations in a formula:

• multiplication *
  
• division /
  
• addition +
  
• subtraction -
  
• exponentiation (^)
  

Each variable in the table (with the exception of quantity) can be set to any value.
But only 3 variables can be used in the formula:

• work days
  
• sides of the print
  
• number of pieces in increments of 100 (constant)
  

This is what the calculator looks like:

spoiler

https://cat-print.ru/calc-vizitki/

Loops like if / if else and any others cannot be used.

Answer 1

Plot charts in EXCEL and try different trend lines. You can also display the trend line formula there.