Pricing help!

I had a meeting with a potential client, and I’m trying to quote them. They own a restaurant with 3 locations and adding 2 more this year. They have 3 bank accounts, 3 cc’s and about 1100 transactions a month. They are currently using Finally as their BK provider but is frustrated with their communication and how slow they are to send reporting/info. They also want to add payroll (weekly payroll, 70 employees). Their immediate need is payroll but would also like to handoff BK as well. I told them I’d give them a proposal with a quote for BK and payroll bundle and then a price for them separately. Thoughts? I’m thinking $4k bundle but not sure if I’m undercharging?