Well, this question could also be unsolvable because it is not very clear. It could be how many miles does he travel each week? each month? each year? but if it's each week the answer would be 152 miles. Each month would be 608 miles. Each year would be 1824 miles.
Each week: (8 * 19)
Each month: (8 * 19) * 4
Each year: (8 * 19) * 12