Platypus Prices

This table shows how the coin and diamond prices for each platypus increase when you buy them. For ease of viewing, 1,000,000 and 1,000,000,000 will be shortened to 1.0 Mi and 1.0 Bi respectively.

The formula for the cost of any particular platypus is apparently (without any known exception)

C = 200 * 2.8^s * 1.15^q

where C is the cost of the platypus, s is the species level of the platypus (Platypus = 1, Adult Platypus = 2, ..., Complexipus = 18), and q is the quantity of that species previously purchased in the current Universe.