Minimum base salary is a term used when an organization's pay schedule includes ranges for each position. For example, if a company advertises a marketing position with a salary range of $40,000 to $47,000, the minimum base salary is $40,000.
Buy a stamp. A stamp is a proof of payment for your postcard: without a stamp, no letter or postcard will be handled by the post office. Depending on the destination, the price of the stamp will vary. Domestic stamps are usually cheaper than international ones.
According to the USPS, the butterfly stamp is intended for greeting cards that may weigh less than one ounce but require non-standard envelopes that carry a surcharge. Its face value is $0.70. At this writing (December 2015) the value of a First Class or Forever stamp is $0.49.