Susan mailed y letters in January . She mailed 3 times as many letters in February . In March , she mailed 10 letters more than half of what she mailed in January and February together . If a letter costs $0.37 to mail , which expression represents the amount of money Susan spent mailing letters in March ? please show your work a.1.48y
b.0.74y+3.7
c.1.48y+3.7
d.2y+10​