Google (NSDQ: GOOG) has been close-lipped about how much it has been spending on its shopping spree, but the company’s just filed 10-Q shows that between January and the end of March it spent $145 million in cash to purchase nine companies. That comes out to just over $16 million each. Google notes that the tab does not include its two largest purchases — On2 Technologies, which it bought for $123 million in stock and its pending deal to buy AdMob for $750 million. The $145 million figure, therefore, includes some of the 12 startups Google has disclosed it has purchased since last August. Expect that figure to grow, since Google has given no signs it is over its shopaholism and with $26.5 billion in the bank it can continue to spend freely.