The following table describes Hamilton's Harmonicas production costs for harmonicas.

Quantity	Cost to produce
1	10
2	30
3	60
4	100
5	150

For example, producing the first unit costs $10. Producing the second unit costs $30 (and therefore the total costs of producing two units is $40). How much producer surplus does Hamilton's Harmonicas earn if the price of harmonicas is $120? Your answer should be a whole number - no rounding is necessary.