Capivate 2017 calculates in a weird way

Hi, Folks

We have conceived a captivate project (Captivate 2017)  in which learners get the opportunity to train their ability to figure out the exact prices of  different packages of our product.

With 8 given package constellations in the shopping cart the learner is asked to type in what she/he assumes as the correct price. Using an advanced action and variables after entering the learne’s input will be displayed, the correct price (i.e. the right answer), and the difference  is calculated. (   1. “Your price enty”  / 2. “correct prince” / 3. “You charged xx.xx Euro too much / too little” )

Our variable is as follows:

print out:

v_difference – v_correct_price – v_customer_x_input

With the learner’s input of smooth amounts everything works fine. But if the learner enters a price that is by (let’s say) 20 cents too much or too little the calculated and displayed difference s a very weird result:

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