Set on Liqpay

All good times of day!
The site acm.in.ua need to tie the payment system Liqpay, as well as synchronize the field of pop-ups with CRM Bitrix 24
Indicative TK in sync with Birix https://docs.google.com/spreadsheets/d/1s4bLF-eRU-1qD0UgLgYtV1m8pq5FQp2P8Q0bkkooxGo/edit#gid=0

Orient please on cost and timing, thank you in advance!)