If, then options with questions and answers

I am trying to create a test where the student will fill out a form. All answer fields are "Fill in the Blank." For each blank, there is a range of correct answers (1.35, 1.36.....1.45) One of the correct answers depends on what they filled out in a previous blank. Is there a way to make this work? See example below for more information.

PCA Dose (mg) = 0.45 < correct answer varies from 0.45 - 1.5

Rate (mg/hour) = 1.35 < correct answer varies from 1.35 - 1.5

Hourly Limit (mg) = 3.6 (equation: PCA Dose(5) + Rate = hourly limit) {0.45(5) + 1.35 = 3.6}