with funds as (
    select
        extract(month from fr.funded_at) mon,
        count(distinct i.fund_id) fund_count
    from funding_round fr
    left join investment i on i.funding_round_id = fr.id
    left join fund f on f.id = i.fund_id
    where
        extract(year from fr.funded_at) between 2010 and 2013 and
        f.country_code = 'USA'
    group by extract(month from fr.funded_at)
),
sells as (
    select
        extract(month from acquired_at) mon,
        count(distinct acquired_company_id) company_count,
        sum(price_amount) sum_price_amount
    from acquisition a
    group by extract(month from a.acquired_at)
)

select
    f.mon,
    f.fund_count,
    sells.company_count,
    sells.sum_price_amount
from funds f
join sells on sells.mon = f.mon