From the shop you can buy 4.3M with 2 tokens
From the primary sponsor you can get more money,or more tokens.The best sponsor for money gives you 4.2M bonus and 1 token,and the one for tokens gives you 3 tokens and 1.3M.But we have a problem here,if you buy 4.3M with 2 tokens after every race you will make 5.6M and 1 token per race.So is more better to sign the sponsor with 3 tokens and 1.3M.And i suggest to make the money expensive,to buy 4.3M with 3 tokens so it will make the earnings from the sponsors more balanced,because now is 100% better to sign the sponsor with 3 tokens and 1.3m because you will make 1.2m more than the one with 4.2M and 1 token