Math problem

a) If you saved $2.00 on January  1, $4.00 on February 1, $6.00 on Monday 1, $8.00 on April 1, and so on, how much money would you save in one year?

Jan. 2
Feb. 4    
 Mar.6
Apr. 8
 May. 10
Jun. 12
 July. 14
Aug. 16
 Sept. 18
Oct. 20
 Nov. 22
Dec. 24 

 156

b) If you saved  $2.00 on January 1, $4.00 on February 1, $6.00 on Monday 1, $8.00 on April 1, and so on, how much money would you save in one year?

Jan.2
Feb.4  
 Mar.8
Apr.16
 May.32
Jun. 64
 July. 128
Aug. 256
 Sept. 512
Oct. 1024
 Nov.2048
Dec. 4096

 8190