If you’re the parent of a high-schooler, you’re probably deep into prom preparation at this time of year. And if a new Visa survey is correct, you’re complaining about how expensive it is. American families with teenagers say they plan to spend an average of $1,078 on prom clothes, transportation, food, tickets and incidentals, a 33.6 percent increase over the $807 they spent last year, Visa reports. The company broke out expenditures by region, and the West (including Colorado) comes in at $744; the Midwest, $696; the South, $1,047 and the Northeast, $1,944. The survey also found that parents who fell into the lower income brackets (under $50,000) plan to spend $1,307 - more than the national average.