500
By Monday morning , 181 payments had been made totaling 29.46564365 BTC ( $ 50,504.23 USD ) .
 ( ransom: payments,  Monday morning: time, 29.46564365 BTC: price, $ 50,504.23 USD: price) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: phishing, data breach, ransom, discover vulnerability, patch vulnerability, Arguments type: vulnerable system, capabilities, vulnerability, number of victim, issues addressed, compromised data, damage amount, common vulnerabilities and exposures, victim, patch number, number of data, tool, discoverer, time, purpose, place, payment method, releaser, vulnerable system version, attacker, supported platform, patch, price, vulnerable system owner, trusted entity, attack pattern. 
Text: {0} 
Answer:
 ( ransom: payments,  Monday morning: time, 29.46564365 BTC: price, $ 50,504.23 USD: price) 