In establishing a new herb farm, your employer has asked you to estimate the bulk density of the farm's soil. Here are the raw data you have assembled using five relatively undisturbed soil cores from random locations at the same depth:

Sample	Coring tool volume	Coring tool mass	Weight of field-moist soil plus coring tool	Weight of oven-dry soil plus coring tool
number	(cm3)	(grams)	(grams)	(grams)
1	221.8	40.30	368.88	326.33
2	221.2	40.71	352.53	335.26
3	210.1	40.59	382.28	324.12
4	215.4	41.19	375.93	332.23
5	223.2	39.53	350.72	334.72

Given these data, what is the average bulk density of this soil in g dry soil/cm³ dry bulk soil?