Answer:
680.. that is if we are only doing 4 weeks = a month but yeah :)
Step-by-step explanation:
about 680
17 months rounds up to 68 weeks so divide by 2 and it would make 34 since jacob is getting the allowance every two weeks then multiply it by 20 which makes 680
i don't know if this is correct but I hope it helps
around 190
