Yukimura and Himuro wear lab coats, as befits science-types, as they get ready to begin their date experiment. Kanade is there to watch over their date and record observations, but she can't help bursting in to tell them to buy date clothes. Both of them are wearing monitors for heart rate, blood pressure, and temperature, and they're using an app to record things like "times my heart raced," "times I felt happy," "times I felt relaxed," and "times I felt uneasy." Suddenly, a man appears and starts hitting on Himuro...!?
For the cost index, we can use the 
inverse of the price as the base.
من أجل مؤشّر الثمن، يمكننا استخدام 
.مقلوب الثمن كقاعدة
Für die Kosten können wir den Kehrwert
des Preises als Basis nehmen.
Para el índice de costo, podemos
usar el precio inverso como base.
Para el índice de coste, podemos
usar el precio inverso como base.
Pour le coût,
prenons une valeur inverse au prix.
Per quanto riguarda l'indice di prezzo,
possiamo usare l'inverso del costo come base.
Para o índice de custo, podemos
usar a inversa do preço como base.
Индекс цены тогда будет 
обратно пропорционален цене.