Blackwelder Snow Removals cost formula for its vehicle operating cost is $1,240 per month plus $348 per snow-day. For the month of December, the company planned for activity of 12 snow-days, but the actual level of activity was 14 snow-days. The actual vehicle operating cost for the month was $6,330. The vehicle operating cost in the planning budget for December would be closest to:

(a) $5,426

(b) $6,112

(c) $5,416

(d) $6,330