For number 7-8. Read the problem and answer the questions below:

On the morning of March 1, the electric meter reading was 26010 kWh. On the evening of March 31,the electric meter reading was 26175 kWh.  

7 . How many kilowatt-hours of electricity were used during  March ?             
A . 165 kWh                         
B . 155 kWh                      
C . 551 kWh                         
D . 255 kWh  

8 . If the electricity cost is Php 5.50 per kWh,how much is the electricity cost For  March?             
A ,Php 852.50                         
B . Php 907.50                  
C . Php 908.50             
D . Php 905.20                                                                                                    

5 points for each number, ty in advance^_^​