The marginal rate of technical substitution always equals A. minus the ratio of the marginal products of inputs. B. the slope of the total product curve. C. the change in output due to a change in the amount of one input. D. the distance between two isoquants.

using conditional formatting with a formula that includes ">50"

Explanation:

As we want to change the cell format not their content, we need to do conditional formatting. We will select the column for the invopice value and highlight above 50.

This will make excel automatically highight the sales. finding cell with numbers greater than 50 will be a manual way to do it also; if latter the value of the cells decrease below 50 dollars it will remain highlight which is an undesired outcome.