In the Oregon Coast Range, it is estimated that there were approximately $4,500$ bobcats tagged for observation at the end of $2017.$ In $2018,315$ old bobcats in the tagged population died, but $675$ new cubs were tagScientists want to predict the number of bobcats will be in this population the following year if the group experiences the same growth rate. Calculate the total number of bobcats that can be expected at the end of $2019.$