[AWS DA] DynamoDB Transactions Calculation for RCU / WCU

Consume 2 x of WCU / RCU

• 5 KB item size, transactional item writes per second: 3

(5 / 1) * 3 * 2 = 30 WCU

• Transactional Item reads per second: 5

Celling(5 / 4) * 5 * 2 = 20 RCU