Alex was planning to set up a business where he would purchase painting for $59 per unit and sell them for $185 per unit. He wanted to conduct a break-even analysis and identified the following costs for running his business: $2,080 per month for store leasing, $970 per month for website hosting fee, $14,900 per month for staff salary, $6,290 per month for advertising costs, and $22 per unit for labour charges to pack the paintings. If Alex wants to make a profit of $4,090 in a month, how many paintings would he have to sell? Round properly.