BFG, Q50, BPP.

Hello tutor, I hope and pray you are doing good…
I’ve a query regarding learning curve. In this particular question, it says,
1- ‘The cost of the first unit was measured at $2500. This was for 500 hours at $5 per hour’.

My query is, can I take 500 as ‘a’ in the equation y=ax^b instead of $2500??

thanks in advance