A Fintech startup participates in an Open Banking ecosystem. It uses an API to fetch customer data from 4 different banks via an Account Aggregator. Each API call costs 2 Rupees. The startup has 10,000 customers and refreshes the data for each customer twice a month. Calculate the total annual API cost for the startup.

A bank processes 50,000 KYC renewals per year manually at a cost of 200 Rupees per KYC. It implements a new Digital KYC solution that costs 50 Lakh Rupees to set up and 20 Rupees per transaction to operate. Calculate the total net cost savings in the first year after implementing this RegTech solution.

Das family members: husband, wife, two children (ages 7 and 13), and the wife's mother (in her sixties), are visiting a science park. The parents and the elder child will attend both days, while the grandmother and the younger child will attend for only one day. The ticket prices are given below: - Adult: Rs. 12 (1 day) / Rs. 20 (2 days) - Child: Rs. 9 (1 day) / Rs. 15 (2 days) - Concession (Under 12 or over 55): Rs. 7 (1 day) / Rs. 14 (2 days) Select the minimum amount spent by the Das family if they buy the cheapest combination of tickets.