Current Postal Rates as of 2018-01-28
Domestic Postcards .35
Domestic 1st Class .50
adtl oz (up to 13) .21
Non-machineable .21
International 1.15 (no goods; new UPU rule)
Best makeup rates:
International == 3x Postcards + Pears == 1.15
International == 2x Forever + NM Surcharge == 1.21
International == 2x Forever + Postcard == 1.35
International == 4x Postcard == 1.40
International == 3x Forever == 1.50
First Class, NM sur == 2x Postcard + 1c == .71
First Class, 2oz == 2x Postcard + 1c == .71
Postcard, NM sur == Forever + 2x 3c == .56
Postcard, NM sur == 2x Postcard == .70