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(Before)
No. of $2-notes : No. of $10-notes = 7 : 2
(After)
No. of $2-notes : No. of $10-notes = 3 : 1 = 6 : 2
7 - 6 = 1 unit
1unit = 6
6 units = 36
2 units = 12
36 x $2 + 12 x $10 = $72 + $120 = $192
(Before)
No. of $2-notes : No. of $10-notes = 7 : 2
(After)
No. of $2-notes : No. of $10-notes = 3 : 1 = 6 : 2
7 - 6 = 1 unit
1unit = 6
6 units = 36
2 units = 12
36 x $2 + 12 x $10 = $72 + $120 = $192