How long should it take for one person to shingle a roof that is 24 ft by 26 ft with a 8 ft pitch?

thats 7 1/4 squares by footage and should be easily done by an experienced roofer in about 5 to 6 hours..inexperienced maybe a full day, or a day and a half..this is doing hand drives and not using a gun..that will be 21 bundles on regular composition(3 bundles to a square) plus the 1/4 which will be an additional bundle..and depending on the ridge cap ..That will take one moore bundle cut into thirds( 1 tab per piece of ridge) so 23 bundles..if they are architectural shinglwe there are 5 bundles to the suqare instead of 3..A full day 1 person can do hand driving..