Question 24
In Elementary School, the student lockers are numbered consecutively beginning with 1. The tin plate used to number these lockers costs Php1.50 per digit; thus number 8 costs Php1.50; number 18 costs Php3.00, and number 108 costs Php 4.50. If numbering all the lockers costs Php 1543.50, how many student lockers are there in the school?