How much does it cost to renew an ACR card in Davao?

Last week the ACR-I cost 3188 pesos ($50), plus 1000 pesos for the express lane.

The ACR card fee is fixed at $50, not in pesos. The amount you actually pay in pesos depends on that day's exchange rate. On top of that, you pay a 1,000 peso express lane fee. This is separate from the cost of a 1-month or 2-month visa extension, which comes with another 2,000 express lane fee.